Portal:Plants

Banksia grossa is a species of shrub in the family Proteaceae and is endemic to Southwest Australia. It is one of fourteen species of banksia of the series Abietinae, all of which bear predominantly cylindrical or oval inflorescences. Collected in 1965, it was first formally described in 1981 by Alex George. Its thick leaves and large seeds distinguish it from other members of the Abietinae, and are the basis of its species name.

Found in sand or sand over laterite among heath between Eneabba and Badgingarra in Western Australia, the species grows as a many-stemmed shrub to 1 m (3.3 ft) high with narrow leaves and oval brownish flower spikes up to 10 cm (4 in) high, composed of hundreds of individual flowers. Flowering occurs throughout the cooler months of March to September. Flower spikes develop woody follicles which bear the seeds. After bushfire, Banksia grossa regenerates from its woody lignotuber; bushfires also stimulate the release of seeds, which germinate after disturbance. Visitors to (and likely pollinators of) inflorescences include insects and a nocturnal mammal, the white-tailed dunnart. (Full article...)

Johann George Adam Forster, also known as Georg Forster (German: [ˈɡeːɔʁk ˈfɔʁstɐ]; 27 November 1754 – 10 January 1794), was a German geographer, naturalist, ethnologist, travel writer, journalist and revolutionary. At an early age, he accompanied his father, Johann Reinhold Forster, on several scientific expeditions, including James Cook's second voyage to the Pacific. His report of that journey, A Voyage Round the World, contributed significantly to the ethnology of the people of Polynesia and remains a respected work. As a result of the report, Forster, who was admitted to the Royal Society at the early age of twenty-two, came to be considered one of the founders of modern scientific travel literature.

After returning to continental Europe, Forster turned toward academia. He taught natural history at the Collegium Carolinum in the Ottoneum, Kassel (1778–84), and later at the Academy of Vilna (Vilnius University) (1784–87). In 1788, he became head librarian at the University of Mainz. Most of his scientific work during this time consisted of essays on botany and ethnology, but he also prefaced and translated many books about travel and exploration, including a German translation of Cook's diaries. (Full article...)

Fertilisation of Orchids is a book by English naturalist Charles Darwin published on 15 May 1862 under the full explanatory title On the Various Contrivances by Which British and Foreign Orchids Are Fertilised by Insects, and On the Good Effects of Intercrossing. Darwin's previous book, On the Origin of Species, had briefly mentioned evolutionary interactions between insects and the plants they fertilised, and this new idea was explored in detail. Field studies and practical scientific investigations that were initially a recreation for Darwin—a relief from the drudgery of writing—developed into enjoyable and challenging experiments. Aided in his work by his family, friends, and a wide circle of correspondents across Britain and worldwide, Darwin tapped into the contemporary vogue for growing exotic orchids.

The book was his first detailed demonstration of the power of natural selection, and explained how complex ecological relationships resulted in the coevolution of orchids and insects. The view has been expressed that the book led directly or indirectly to all modern work on coevolution and the evolution of extreme specialisation. It influenced botanists, and revived interest in the neglected idea that insects played a part in pollinating flowers. It opened up the new study areas of pollination research and reproductive ecology, directly related to Darwin's ideas on evolution, and supported his view that natural selection led to a variety of forms through the important benefits achieved by cross-fertilisation. Although the general public showed less interest and sales of the book were low, it established Darwin as a leading botanist. Orchids was the first in a series of books on his innovative investigations into plants. (Full article...)

Aquilegia, commonly known as columbines, is a genus of perennial flowering plants in subfamily Thalictroideae of the family Ranunculaceae (buttercups). The genus includes between 70 and 400 taxa (described species and subspecies) with natural ranges across the Northern Hemisphere. Natural and introduced populations of Aquilegia exist on all continents but Antarctica. Known for their high physical variability and ease of hybridization, columbines are popular garden plants and have created many cultivated varieties.

Aquilegia plants typically possess stiff stems and leaves that divide into multiple leaflets. Columbines often have colorful flowers with five sepals and five petals. The petals generally feature nectar spurs which differ in length between species. In North America, morphological variations in spurs evolved to suit different pollinators. Some species and varieties of columbines are naturally spurless. In cultivation, varieties bearing significantly altered physical traits such as double flowering are prevalent. (Full article...)

Adiantum viridimontanum, commonly known as Green Mountain maidenhair fern, is a fern found only in outcrops of serpentine rock in New England and Eastern Canada. The leaf blade is cut into finger-like segments, themselves once-divided, which are borne on the outer side of a curved, dark, glossy rachis. These finger-like segments are not individual leaves, but parts of a single compound leaf. The "fingers" may be drooping or erect, depending on whether the individual fern grows in shade or sunlight. Spores are borne under false indusia at the edge of the subdivisions of the leaf, a characteristic unique to the genus Adiantum.

Until 1991, A. viridimontanum was grouped with the western maidenhair fern, A. aleuticum, which grows both in western North America and as a disjunct on serpentine outcrops in eastern North America. At one time, A. aleuticum itself was classified as a variety (A. pedatum var. aleuticum) of the northern maidenhair fern, A. pedatum. However, after several years of study, botanist Cathy Paris recognized that A. aleuticum was a distinct species, and that some of the specimens that had been attributed to that taxon (group of organisms) were a third, hybrid species intermediate between A. pedatum and A. aleuticum. She named the new species A. viridimontanum for the site of its discovery in the Green Mountains in Vermont; it has since been located in Quebec and in one site in coastal Maine. (Full article...)

William Thomas Stearn CBE FLS VMH (/stɜːrn/; 16 April 1911 – 9 May 2001) was a British botanist. Born in Cambridge in 1911, he was largely self-educated and developed an early interest in books and natural history. His initial work experience was at a Cambridge bookshop, but he also had an occupation as an assistant in the university botany department. At the age of 29, he married Eldwyth Ruth Alford, who later became his collaborator.

While at the bookshop, he was offered a position as a librarian at the Royal Horticultural Society in London (1933–1952). From there he moved to the Natural History Museum as a scientific officer in the botany department (1952–1976). After his retirement, he continued working there, writing, and serving on a number of professional bodies related to his work, including the Linnean Society, of which he became president. He also taught botany at Cambridge University as a visiting professor (1977–1983). (Full article...)

Alloxylon flammeum, commonly known as the Queensland tree waratah or red silky oak, is a medium-sized tree of the family Proteaceae found in the Queensland tropical rain forests of northeastern Australia. It has shiny green elliptical leaves up to 18 cm (7.1 in) long, and prominent orange-red inflorescences that appear from August to October, followed by rectangular woody seed pods that ripen in February and March. Juvenile plants have large (up to 25 cm (9.8 in) long) deeply lobed pinnate leaves. Previously known as Oreocallis wickhamii, the initial specimen turned out to be a different species to the one cultivated and hence a new scientific name was required. Described formally by Peter Weston and Mike Crisp in 1991, A. flammeum was designated the type species of the genus Alloxylon. This genus contains the four species previously classified in Oreocallis that are found in Australasia.

Alloxylon flammeum is a canopy or emergent tree of the Mabi rainforest community of north Queensland. Its terminal tubular flowers indicate that the species is pollinated by birds. Readily adaptable to cultivation, Alloxylon flammeum prefers a site with good drainage and responds well to extra moisture and fertilisers low in phosphorus. It is listed nationally as vulnerable under the Australian Environment Protection and Biodiversity Conservation Act 1999 (EPBC Act) as most of its habitat has been cleared for agriculture and logging. (Full article...)

Adenanthos cuneatus, also known as coastal jugflower, flame bush, bridle bush and sweat bush, is a shrub of the family Proteaceae, native to the south coast of Western Australia. The French naturalist Jacques Labillardière originally described it in 1805. Within the genus Adenanthos, it lies in the section Adenanthos and is most closely related to A. stictus. A. cuneatus has hybridized with four other species of Adenanthos. Growing to 2 m (6 ft 7 in) high and wide, it is erect to prostrate in habit, with wedge-shaped lobed leaves covered in fine silvery hair. The single red flowers are insignificant, and appear all year, though especially in late spring. The reddish new growth occurs over the summer.

It is sensitive to Phytophthora cinnamomi dieback, hence requiring a sandy soil and good drainage to grow in cultivation, its natural habitat of sandy soils in heathland being an example. Its pollinators include bees, honey possum, silvereye and honeyeaters, particularly the western spinebill. A. cuneatus is grown in gardens in Australia and the western United States, and dwarf and prostrate forms are commercially available. (Full article...)

Ficus obliqua, commonly known as the small-leaved fig, is a tree in the family Moraceae, native to eastern Australia, New Guinea, eastern Indonesia to Sulawesi and islands in the southwestern Pacific Ocean. Previously known for many years as Ficus eugenioides, it is a banyan of the genus Ficus, which contains around 750 species worldwide in warm climates, including the edible fig (Ficus carica). Beginning life as a seedling, which grows on other plants (epiphyte) or on rocks (lithophyte), F. obliqua can grow to 60 m (200 ft) high and nearly as wide with a pale grey buttressed trunk, and glossy green leaves.

The small round yellow fruit ripen and turn red at any time of year, although ripening peaks in autumn and winter (April to July). Known as a syconium, the fruit is an inverted inflorescence with the flowers lining an internal cavity. Ficus obliqua is pollinated by two species of fig wasp—Pleistodontes greenwoodi and P. xanthocephalus. Many species of bird, including pigeons, parrots and various passerines, eat the fruit. The range is along the east coast from Queensland, through New South Wales in rainforest, savanna woodland, sclerophyll forest and gallery forest. It is used as a shade tree in parks and public spaces, and is well-suited for use as an indoor plant or in bonsai. All parts of the tree have been used in traditional medicine in Fiji. (Full article...)

Ficus aurea, commonly known as the Florida strangler fig (or simply strangler fig), golden fig, or higuerón, is a tree in the family Moraceae that is native to the U.S. state of Florida, the northern and western Caribbean, southern Mexico and Central America south to Panama. The specific epithet aurea was applied by English botanist Thomas Nuttall who described the species in 1846.

Ficus aurea is a strangler fig. In figs of this group, seed germination usually takes place in the canopy of a host tree with the seedling living as an epiphyte until its roots establish contact with the ground. After that, it enlarges and strangles its host, eventually becoming a free-standing tree in its own right. Individuals may reach 30 m (100 ft) in height. The tree provides habitat, food and shelter for a host of tropical lifeforms including epiphytes in cloud forests and birds, mammals, reptiles and invertebrates. F. aurea is used in traditional medicine, for live fencing, as an ornamental and as a bonsai. (Full article...)

Banksia brownii, commonly known as feather-leaved banksia or Brown's banksia, is a species of shrub that grows in southwest Western Australia. A plant with fine feathery leaves and large red-brown flower spikes, it usually grows as an upright bush around two metres (6.6 ft) high, but can also occur as a small tree or a low spreading shrub. First collected in 1829 and published the following year, it is placed in Banksia subgenus Banksia, section Oncostylis, series Spicigerae. There are two genetically distinct forms.

Banksia brownii occurs naturally only in two population clusters between Albany and the Stirling Range in southwest Western Australia. In the Stirling Range it occurs among heath on rocky mountain slopes; further south it occurs among jarrah woodland in shallow nutrient-poor sand. It has been evaluated as critically endangered by the International Union for Conservation of Nature (IUCN); all major populations are threatened by Phytophthora cinnamomi dieback, a disease to which the species is highly susceptible. Other threats include loss of habitat, commercial exploitation and changes to the fire regime. Highly valued by Australia's horticultural and cut flower industries, B. brownii is widely cultivated in areas not exposed to dieback. It prefers a sheltered position in soil with good drainage, and must be provided with some moisture over summer. (Full article...)

Banksia blechnifolia is a species of flowering plant in the genus Banksia found in Western Australia. It was first described by Victorian state botanist Ferdinand von Mueller in 1864, and no subspecies are recognised. It gained its specific name as its leaves are reminiscent of a fern (Blechnum). B. blechnifolia is one of several closely related species that grow as prostrate shrubs, with horizontal stems and leathery, upright leaves. The red-brown flower spikes, known as inflorescences, are up to 20 centimetres (8 in) high and appear from September to November in the Australian spring. As the spikes age, each turns grey and develops as many as 25 woody seed pods, known as follicles.

Insects such as bees, wasps, ants and flies pollinate the flowers. Found in sandy soils in the south coastal region of Western Australia in the vicinity of Lake King, B. blechnifolia is non-lignotuberous, regenerating by seed after bushfire. The plant adapts readily to cultivation, growing in well-drained sandy soils in sunny locations. It is suitable for rockeries and as a groundcover. (Full article...)

Epacris impressa, also known as common heath, is a species of plant in the heath family Ericaceae. It is native to south-eastern Australia (the states of Victoria, Tasmania, South Australia and New South Wales). French botanist Jacques Labillardière collected the species in 1793 and described it in 1805. Four forms have been identified, but no subspecies are recognised. Growing in heathland, shrubland or open forest, it is generally a small shrub around 0.5 to 1 m (1 ft 8 in to 3 ft 3 in) tall, with small stiff leaves. The red, pink or white tube-like flowers appear from late autumn to early spring. Honeyeater birds, particularly the eastern spinebill, feed upon the nectar of the flowers. It regenerates after bushfire by seed or by resprouting.

A highly regarded garden plant, the common heath was first cultivated in England in 1825; over seventy named cultivars have been developed, most of which have now vanished. A pink-flowered form, often referred to as "pink heath", is the floral emblem of the state of Victoria. Epacris impressa has proven a difficult plant to propagate reliably, which has limited its use in horticulture and revegetation. It grows best in well-drained but moist soil in a semishaded position. (Full article...)

Telopea oreades, commonly known as the Gippsland-, mountain- or Victorian waratah, is a large shrub or small tree in the family Proteaceae. Native to southeastern Australia, it is found in wet sclerophyll forest and rainforest on rich acidic soils high in organic matter. No subspecies are recognised, though a northern isolated population hybridises extensively with the Braidwood waratah (T. mongaensis). Reaching a height of up to 19 metres (62 feet), T. oreades grows with a single trunk and erect habit. It has dark green leaves with prominent veins that are 11–28 centimetres (4.3–11 in) long and 1.5–6 cm (0.6–2.4 in) wide. The red flower heads, known as inflorescences, appear in late spring. Each is composed of up to 60 individual flowers.

In the garden, T. oreades grows in soils with good drainage and ample moisture in part-shaded or sunny positions. Several commercially available cultivars that are hybrid forms with T. speciosissima have been developed, such as the 'Shady Lady' series. The timber is hard and has been used for making furniture and tool handles. (Full article...)

Isopogon anemonifolius, commonly known as broad-leaved drumsticks, is a shrub of the family Proteaceae that is native only to eastern New South Wales in Australia. It occurs naturally in woodland, open forest, and heathland on sandstone soils. I. anemonifolius usually ranges between one and two metres in height, and is generally smaller in exposed heathland. Its leaves are divided and narrow, though broader than those of the related Isopogon anethifolius, and have a purplish tinge during the cooler months. The yellow flowers appear during late spring or early summer and are displayed prominently. They are followed by round grey cones, which give the plant its common name drumsticks. The small hairy seeds are found in the old flower parts.

A long-lived plant reaching an age of up to 60 years, I. anemonifolius resprouts from its woody base, known as a lignotuber, after bushfire. Seedlings appear in the year following a fire. Although I. anemonifolius was collected by Daniel Solander in 1770, it was not described until 1796 by Richard Salisbury. Several varieties have been named, though none are now recognised as distinct. It was first cultivated in the United Kingdom in 1791. I. anemonifolius grows readily in the garden if located in a sunny or part-shaded spot with sandy soil and good drainage. (Full article...)

Jelena de Belder-Kovačič (23 August 1925 – 31 August 2003) was a Slovenian-Belgian botanist and horticulturist, who worked extensively on the taxonomy and preservation of plant specimens, gaining an international reputation for her development of the Kalmthout and Hemelrijk Arboreta. Several varieties of plants she cultivated were recognized with awards from the Royal Horticultural Society in London and she was elevated to Baroness by Albert II of Belgium for her contributions to dendrology. (Full article...)

Herbal medicine (also called herbalism, phytomedicine or phytotherapy) is the study of pharmacognosy and the use of medicinal plants, which are a basis of traditional medicine. Scientific evidence for the effectiveness of many herbal treatments remains limited, prompting ongoing regulatory evaluation and research into their safety and efficacy. Standards for purity or dosage are generally not provided. The scope of herbal medicine sometimes includes fungal and bee products, as well as minerals, shells and certain animal parts.

Paraherbalism is the pseudoscientific use of plant or animal extracts as medicine, relying on unproven beliefs about the safety and effectiveness of minimally processed natural substances. (Full article...)

Herbicides (US: /ˈɜːrbɪsaɪdz/, UK: /ˈhɜːr-/), also commonly known as weed killers, are substances used to control undesired plants, also known as weeds. Selective herbicides control specific weed species while leaving the desired crop relatively unharmed, while non-selective herbicides (sometimes called "total weed killers") kill plants indiscriminately. The combined effects of herbicides, nitrogen fertilizer, and improved cultivars has increased yields (per acre) of major crops by three to six times from 1900 to 2000.

In the United States in 2012, about 91% of all herbicide usage was, determined by weight, applied in agriculture. In 2012, world pesticide expenditures totaled nearly US$24.7 billion; herbicides were about 44% of those sales and constituted the biggest portion, followed by insecticides, fungicides, and fumigants. Herbicide is also used in forestry, where certain formulations have been found to suppress hardwood varieties in favor of conifers after clearcutting, as well as pasture systems. (Full article...)

Chamaenerion is a genus of flowering plants in the family Onagraceae (the evening primrose or willowherb family). It has sometimes been included in the genus Epilobium. Members of the genus may be called willowherbs (along with Epilobium), or fireweeds, based on a common name used for C. angustifolium. They are upright herbaceous perennials, growing from a woody base or from rhizomes, with racemes of usually purple to pink flowers. All species are found in the northern hemisphere. Most occur in moist habitats; C. angustifolium is the exception, favouring disturbed ground. (Full article...)

James Cocker and Sons is a nursery business located in Aberdeen, Scotland. Founded in 1841 (185 years ago) (1841) by James Cocker, the company has been owned by the Cocker family for five generations. During the last seventy years, the nursery has introduced more than 100 new rose varieties and holds Royal Warrants from Queen Elizabeth, the Queen Mother, and the Prince of Wales. James Cocker & Sons is best known for creating the hybrid tea rose, 'Silver Jubilee', the popular rose named in honour of the Queen's 25 years reign. The rose was developed by Alec Cocker, and introduced by his wife, Anne Cocker, after Alec's death in 1977. Anne continued to breed roses and manage the company until she was in her eighties. She won multiple horticultural awards and was internationally recognized for her work. (Full article...)

Plant reproductive morphology is the study of the physical form and structure (the morphology) of those parts of plants directly or indirectly concerned with sexual reproduction.

Among all living organisms, flowers, which are the reproductive structures of flowering plants (angiosperms), are the most varied physically and show a correspondingly great diversity in methods of reproduction. Plants that are not flowering plants (green algae, mosses, liverworts, hornworts, ferns and gymnosperms such as conifers) also have complex interplays between morphological adaptation and environmental factors in their sexual reproduction. (Full article...)

Solanum melongena is a plant species in the nightshade family Solanaceae, grown worldwide for its edible fruit, typically used as a vegetable in cooking. It is known by a number of names, including eggplant, aubergine, and brinjal.

Most commonly purple, the spongy, absorbent fruit is used in several cuisines. It is a berry by botanical definition. As a member of the genus Solanum, it is related to the tomato, chili pepper, and potato, although those are of the Americas region while the eggplant is of the Eurasia region. Like the tomato, its skin and seeds can be eaten, but it is usually eaten cooked. Eggplant is nutritionally low in macronutrient and micronutrient content, but the capability of the fruit to absorb oils and flavors into its flesh through cooking expands its use in the culinary arts. (Full article...)

Iris is a flowering plant genus of 320 accepted species with showy flowers. As well as being the scientific name, iris is also widely used as a common name for all Iris species, as well as some belonging to other closely related genera. A common name for some species is flags, while the plants of the subgenus Scorpiris are widely known as junos, particularly in horticulture. It is a popular garden flower.

The often-segregated, monotypic genera Belamcanda (blackberry lily, I. domestica), Hermodactylus (snake's head iris, I. tuberosa), and Pardanthopsis (vesper iris, I. dichotoma) are currently included in Iris. (Full article...)

Nepeta cataria, commonly known as catnip or catmint, is a species of the genus Nepeta in the mint family. It is native to southern and eastern Europe, northern parts of the Middle East, and Central Asia. The plant is widely naturalized in northern Europe, New Zealand, and North America. The common name catmint can also refer to the genus as a whole.

Catnip is a short-lived perennial herb that grows between 30–100 cm (12–39 in) tall. It has square stems, grayish canescent leaves that vary in shape and have serrated edges, fragrant small bilabiate flowers arranged in raceme spikes, and produces small three-sided nutlets containing one to four seeds. It was described by Carl Linnaeus in 1753, with no subspecies but multiple botanical synonyms. Its name is derived from medieval Latin and reflects its historical association with cats and various traditional names dating back to medieval England. (Full article...)

Orchids are plants that belong to the family Orchidaceae (/ˌɔːrkɪˈdeɪsi.iː, -si.aɪ/), a diverse and widespread group of flowering plants with blooms that are often colourful and fragrant. Orchids are cosmopolitan plants, living in diverse habitats on every continent except Antarctica. The world's richest diversity of orchid genera and species is in the tropics. Many species are epiphytes, living on trees. The flowers and their pollination mechanisms are highly specialized, attracting insect pollinators by colour, pattern, scent, pheromones, and sometimes by mimicking female insects. Orchids have very small seeds, relying on fungal partners for germination. Some orchids have no leaves, either photosynthesizing with their roots or relying entirely on fungal partners for food.

Orchidaceae is one of the two largest families of flowering plants. It contains about 28,000 currently accepted species in around 700 genera. That represents some 6–11% of all species of seed plants. Horticulturists run many orchid societies around the world; they have produced many hybrids and cultivars. (Full article...)

Photosynthetic reaction centre proteins are main protein components of photosynthetic reaction centres (RCs) of bacteria and plants. They are transmembrane proteins embedded in the chloroplast thylakoid or bacterial cell membrane.

Plants, algae, and cyanobacteria have one type of PRC for each of its two photosystems. Non-oxygenic bacteria, on the other hand, have an RC resembling either the Photosystem I centre (Type I) or the Photosystem II centre (Type II). In either case, PRCs have two related proteins (L/M; D1/D2; PsaA/PsaB) making up a quasi-symmetrical 5-helical core complex with pockets for pigment binding. The two types are structurally related and share a common ancestor. Each type have different pockets for ligands to accommodate their specific reactions: while Type I RCs use iron sulfur clusters to accept electrons, Type II RCs use quinones. The centre units of Type I RCs also have six extra transmembrane helices for gathering energy. (Full article...)

Hops are the green flowers (also called seed cones or strobiles) of the hop plant Humulus lupulus, a member of the Cannabaceae family of flowering plants. They are used primarily as a bittering, flavouring, and stability agent in beer, to which, in addition to bitterness, they impart floral, fruity, or citrus flavours and aromas. Hops are also used for various purposes in other beverages and herbal medicine. The hops plants have separate female and male plants, and only female plants are used for commercial production. The hop plant is a vigorous climbing herbaceous perennial, usually trained to grow up strings in a field called a hopfield, hop garden (in the South of England), or hop yard (in the West Country and United States) when grown commercially. Many different varieties of hops are grown by farmers around the world, with different types used for particular styles of beer.

The first documented use of hops in beer is from the 9th century, though Hildegard of Bingen, 300 years later, is often cited as the earliest documented source. Before this period, brewers used a "gruit", composed of a wide variety of bitter herbs and flowers, including dandelion, burdock root, marigold, horehound (the old German name for horehound, Berghopfen, means 'mountain hops'), ground ivy, and heather. Early documents include mention of a hop garden in the will of Charlemagne's father, Pepin the Short. (Full article...)

Acer is a genus of trees and shrubs commonly known as maples. The genus is placed in the soapberry family Sapindaceae. There are approximately 132 species, most of which are native to East Asia, with a number also appearing in Europe, northern Africa, and North America. Only one species, Acer laurinum, extends to the Southern Hemisphere. The type species of the genus is the sycamore maple Acer pseudoplatanus, one of the most common maple species in Europe. Most maples have easily identifiable palmate leaves (with a few exceptions, such as Acer carpinifolium, Acer laurinum, and Acer negundo) and all share distinctive winged fruits. The closest relative of the maples is the small east Asian genus Dipteronia, followed by the more widespread genus Aesculus (buckeyes and horse-chestnuts). Maple syrup is made from the sap of some maple species. It is one of the most common genera of trees in Asia. Many maple species are grown in gardens where they are valued for their autumn colour and often decorative foliage, some also for their attractive flowers, fruit, or bark. (Full article...)

Vegetative reproduction (also known as vegetative propagation, vegetative multiplication or cloning) is a form of asexual reproduction occurring in plants in which a new plant grows from a fragment or cutting of the parent plant or specialized reproductive structures, which are sometimes called vegetative propagules.

Many plants naturally reproduce this way, but it can also be induced artificially. Horticulturists have developed asexual propagation techniques that use vegetative propagules to replicate plants. Success rates and difficulty of propagation vary greatly. Monocotyledons typically lack a vascular cambium, making them more challenging to propagate. (Full article...)

Gregor Johann Mendel (/ˈmɛndəl/; German: [ˈmɛndl̩]; Czech: Řehoř Jan Mendel; 20 July 1822 – 6 January 1884) was an Austrian biologist, meteorologist, mathematician, Augustinian friar and abbot of St. Thomas' Abbey in Brno (Brünn), Margraviate of Moravia. Mendel was born in a German-speaking family in the Silesian part of the Austrian Empire (today's Czech Republic) and gained posthumous recognition as the founder of the modern science of genetics. Though farmers had known for millennia that crossbreeding of animals and plants could favor certain desirable traits, Mendel's pea plant experiments conducted between 1856 and 1863 established many of the rules of heredity, now referred to as the laws of Mendelian inheritance.

Mendel worked with seven characteristics of pea plants: plant height, pod shape and colour, seed shape and colour, and flower position and colour. Taking seed colour as an example, Mendel showed that when a true-breeding yellow pea and a true-breeding green pea were cross-bred, their offspring always produced yellow seeds. However, in the next generation, the green peas reappeared at a ratio of 1 green to 3 yellow. To explain this phenomenon, Mendel coined the terms "recessive" and "dominant" in reference to certain traits. In the preceding example, the green trait, which seems to have vanished in the first filial generation, is recessive, and the yellow is dominant. He published his work in 1866, demonstrating the actions of invisible "factors"—now called genes—in predictably determining the traits of an organism. The actual genes were only discovered in a long process that ended in 2025 when the last three of the seven Mendel genes were identified in the pea genome. (Full article...)

Life is the capacity in matter, formed of one or more units called cells, for processes such as cell signalling, homeostasis, metabolism, cell growth, adaptation, response to stimuli, and reproduction. All life eventually reaches a state of death. Many philosophical definitions of living systems have been proposed, such as self-organising systems. Defining life is further complicated by viruses, which replicate only in host cells, and the possibility of extraterrestrial life, which could be very different from life on Earth. Life exists all over the Earth in air, water, and soil, with many ecosystems forming the biosphere. Some of these are harsh environments occupied only by extremophiles. The life in a particular ecosystem is called its biota.

Life has been studied since ancient times, with theories such as Empedocles's materialism asserting that it was composed of four eternal elements, and Aristotle's hylomorphism asserting that living things have souls and embody both form and matter. Life originated at least 3.5 billion years ago, resulting in a universal common ancestor. This evolved into all the species that exist now, by way of many extinct species, some of which have left traces as fossils. Attempts to classify living things, too, began with Aristotle. Modern classification began with Carl Linnaeus's system of binomial nomenclature in the 1740s. (Full article...)

Hypericum iwatelittorale, originally styled Hypericum iwate-littorale, is a species of flowering plant of the St John's wort family (Hypericaceae). Named for its habitat in the coastal regions of the Iwate Prefecture in Japan, the species is a small perennial herb with many small star-shaped flowers of bright yellow petals. It grows upright, with oval to elliptical leaves that are papery in texture and have an array of glands. Each flower has dozens of stamens, and the seeds are dark brown.

Described in 1937 by Japanese botanist Hideo Koidzumi, Hypericum iwatelittorale has at times been considered a synonym of H. pseudopetiolatum. However, it was accepted as a valid species in 2003 by English botanist Norman Robson. Robson placed the species into the type section of Hypericum, and noted its similarities to H. tosaense. While several conservation surveys have included the species, each classified it as data deficient and gave no assessment as to its status. (Full article...)

Old Tjikko is an approximately 9,568-year-old Norway spruce, located in the Dalarna province in Sweden. Old Tjikko originally gained fame as the "world's oldest tree". Old Tjikko is, however, a clonal tree that has regenerated new trunks, branches and roots over millennia rather than an individual tree of great age. Old Tjikko is recognized as the oldest living Picea abies and the fourth-oldest known clonal tree.

The age of the tree was determined by carbon dating of genetically matched plant material collected from under the tree, as dendrochronology does not work for clonal trees. The trunk itself is estimated to be only a few centuries old, but the plant has survived for much longer due to a process known as layering (when a branch comes in contact with the ground, it sprouts a new root), or vegetative cloning (when the trunk dies but the root system is still alive, it may sprout a new trunk). (Full article...)

Hedycarya arborea, commonly known as pigeonwood and porokaiwhiri, is a species of shrub or small tree in the family Monimiaceae. It is endemic to New Zealand; its range covers the North and South Islands. It is also found on the Manawatāwhi / Three Kings Islands. The species is highly shade-tolerant and is commonly found in wet environments. It reaches a height of up to 12 metres (40 feet) and produces bright orange to red fruits.

Hedycarya arborea was first scientifically described in 1776 by the German naturalists Georg and Johann Reinhold Forster. H. arborea is primarily wind-pollinated. The fruits are dispersed by fruit-eating animals (frugivores), such as birds. The fruits are not edible and may be poisonous. The indigenous Māori people did not traditionally eat the fruits, although they did use the tree as a source of timber, and the leaves had some medicinal uses. H. arborea's 2023 conservation status in the New Zealand Threat Classification System was "Not Threatened". (Full article...)

Christian Ramsay, Countess of Dalhousie (née Broun; 28 February 1786 – 22 January 1839), informally Lady Dalhousie, was a Scottish botanist and natural historian. She married George Ramsay, 9th Earl of Dalhousie and travelled with him when he was appointed Lieutenant Governor of Nova Scotia, Governor General of Canada and Commander in Chief of the Indian Army. While travelling, she collected and catalogued many species of plants, presented scientific papers to societies and donated many collections to different botanical groups.

Lady Dalhousie was made an honorary member of the Botanical Society of Edinburgh and was its only female honorary member until her death. A genus of tropical plant, Dalhousiea, is named after her. (Full article...)

The flora of Samoa comprises a range of vascular and non-vascular plants (moss and liverworts) found in the Samoan Islands. The flora comprises 833 native and naturalised flowering plants, 482 bryophyte species (including 248 species of moss and 234 liverwort species), and 225 species of ferns and fern allies. The islands that support this flora are of volcanic origin, with peaks rising to 1,858 m (6,096 ft). The volcanic landforms of the islands, combined with a tropical climate and high rainfall create a diverse range of habitats from mangrove forests along coastlines to lowland rainforests and cloud forests at higher elevations. The islands lie within the Polynesia-Micronesia biodiversity hotspot, an area with high levels of endemism. Most Samoan plants have origins in Southeast Asia and New Guinea, but a small number of species may have originated from the Americas. There are 540 native flowering plants and around one third of these are endemic. The largest family within the flowering plants of Samoa are orchids, with 101 native species, representing the highest diversity of orchid flora among all Polynesian islands.

Around 80% of original lowland forest has been lost to logging and agriculture. Plant habitats are also threatened by invasive species and eradication programmes are in place for some of these. Conservation initiatives focus on ecosystem conservation and sustainable development. In one example, 12,000 ha (30,000 acres) of lowland rainforest at Falealupo on the island of Savaiʻi has been protected with a covenant by the traditional village owners. Specific conservation measures have been taken to preserve rare and endangered plants, with the establishment of a conservation garden at the Vailima Botanical Gardens on the island of Upolu. Many of Samoa's plants are important for practical and cultural purposes and for traditional medicine. (Full article...)

Durio graveolens, sometimes called the red-fleshed durian, orange-fleshed durian, or yellow durian, is a species of tree in the family Malvaceae. It is one of six species of durian named by Italian naturalist Odoardo Beccari. The specific epithet graveolens ('strong smelling' or 'rank') is due to the odor. Although most species of Durio (most notably Durio dulcis) have a strong scent, the red-fleshed type of D. graveolens has a mild scent. It is native to Southeast Asia.

D. graveolens is an edible durian, perhaps the most popular 'wild' species of durian, and it is sold commercially regionally. (Full article...)

Pi de les tres branques (Catalan: [ˈpi ðə ləs ˈtɾɛz ˈβɾaŋkəs]; meaning "the three-branched pine") is a dead pine tree located in the countryside near the town of Berga in north-central Catalonia, Spain. It has long been regarded by some Catalan nationalists as representing the unity of the three "Catalan Countries" and is the site of regular political-cultural gatherings.

The tree has been dead since 1915 and is in poor structural condition, due in part to politically-motivated vandalism, but there is a very similar living tree a short distance away known as Pi jove de les tres branques ("the young three-branched pine"), which is regarded as its successor. Both are protected as "monumental trees" by the Catalan Generalitat. (Full article...)

A plant epithet is a name used to label a person or group, by association with some perceived quality of a plant. Vegetable epithets may be pejorative, such as turnip, readily giving offence, or positive, such as rose or other flowers implying beauty. Tree and flower forenames such as Hazel, Holly, Jasmine and Rose are commonly given to girls. Tree surnames such as Oakes (Oak) and Nash (Ash) are toponymic, given to a person in the Middle Ages who lived in a place near a conspicuous tree. A few plant surnames such as Pease and Onions are metonymic, for sellers of peas and onions respectively. Finally, plant surnames are sometimes emblematic, as in the name Rose, used as a family emblem. (Full article...)

Mammillaria spinosissima (/ˌmæmɪˈlɛəriə ˌspɪnoʊˈsɪsɪmə/), also known as the spiny pincushion cactus, is a species of flowering plant in the cactus family Cactaceae, endemic to the central Mexican states of Guerrero and Morelos, where they grow at elevations of approximately 1,600 to 1,900 metres (5,200 to 6,200 ft). The species was described in 1838 by James Forbes, gardener of the Duke of Bedford. Botanist David Hunt collected a specimen in 1971, when he located one near Sierra de Tepoztlan, Mexico.

M. spinosissima thrive in well-drained soils that are sandy or loam, with a pH ranging from acidic to neutral. They prefer low humidity and full, filtered sun. Plants are typically watered once every two or three weeks, and kept nearly dry during the winter months. They require no pruning and make good patio and container plants. They are relatively disease resistant, but susceptible to pests such as mealybugs. Synonyms of M. spinosissima include Mammillaria centraliplumosa, Mammillaria haasii, and Mammillaria virginis. (Full article...)

Sorghum bicolor, commonly called sorghum (/ˈsɔːrɡəm/) and also known as broomcorn, great millet, Indian millet, Guinea corn, jowar, or milo, is a species in the grass genus Sorghum. It is typically an annual, but some cultivars are perennial. It grows in clumps that may reach over 4 metres (13 ft) high. The grain is 2 to 4 millimetres (0.08 to 0.2 in) in diameter.

The species originated and was domesticated in Sudan. Native to Africa and the Indian subcontinent, it is cultivated in tropical and subtropical regions for its grain. It is the world's fifth-most important cereal crop. The grain is used as food by humans, while the plant is used for animal feed and ethanol production. (Full article...)

El Palo Alto (Spanish: 'the tall stick') is a coast redwood (Sequoia sempervirens) located on the banks of San Francisquito Creek in Palo Alto, California, a city in the San Francisco Bay Area. The namesake of the city and a historical landmark, El Palo Alto is 1085–1086 years old and stands 110 feet (34 m) tall.

Before European arrival, the land around El Palo Alto was home to the Ohlone Native Americans. Local folklore holds that El Palo Alto was a rest stop for the first European expedition that discovered San Francisco Bay, led by Spanish explorer Gaspar de Portolá in 1769. The tree became widely known with the early-1850s establishment of a highway between San Francisco and San Jose, and as a landmark along the San Francisco–San Jose railroad, construction of which passed the tree in 1863. In 1876, Leland Stanford, co-founder of Stanford University along with his wife Jane Lathrop Stanford, purchased land near El Palo Alto. (Full article...)

The cherry blossom, or sakura, is the flower of trees in Prunus subgenus Cerasus. Sakura usually refers to flowers of ornamental cherry trees, such as cultivars of Prunus serrulata, not trees grown for their fruit (although these also have blossoms). Cherry blossoms have been described as having a vanilla-like smell, which is mainly attributed to coumarin.

Wild species of cherry tree are widely distributed, mainly in the Northern Hemisphere. They are common in East Asia, especially in Japan, where they have been cultivated, producing many varieties. (Full article...)

Pectinopitys ferruginea, commonly known as miro and brown pine, is a species of tree in the family Podocarpaceae. It is a dioecious evergreen conifer, reaching heights of up to 25 metres (80 feet), with a trunk up to 1–1.5 metres (3–5 ft) in diameter. It is endemic to New Zealand; its range mainly covers the North, South, and Stewart Islands, typically inhabiting lowland to montane forests. Its leaves are dark-green to bronze-green in colour, and are pectinate, meaning they are arranged closely together, similar to a comb. The berry-like cones of P. ferruginea are red to pinkish-red in colour and are up to 20 mm long. P. ferruginea has an estimated lifespan of 250–350 years, although it may live as long as 770 years.

P. ferrugina was first described by the British botanist Aylmer Bourke Lambert in 1832. The species has had several other scientific synonyms up until 2019, when the British botanist Chris Page moved this species to a newly-described genus, Pectinopitys, rather than Prumnopitys, based on cytogenetic, molecular and morphological analyses. The cones of P. ferruginea are an important food source for numerous birds, and especially the kererū (Hemiphaga novaeseelandiae). Historically, the timber has been used to construct houses, and used as a substitution for mataī (Prumnopitys taxifolia). The conservation status of P. ferruginea was assessed by the IUCN Red List in 2013 as "Least Concern". (Full article...)

Hammarbya is a genus in the orchid family (Orchidaceae) containing the single species Hammarbya paludosa, commonly known as the bog orchid, bog adder's-mouth or bog adder's-mouth orchid. It is known for being the only epiphytic orchid native to northern North America and for being the only orchid to produce plantlets on the tips of its leaves. It is also called Malaxis paludosa by some authorities who included it within the closely related genus Malaxis.

A small, short-lived perennial, H. paludosa flowers every one or two years for about a month at the end of summer and is pollinated by fungus gnats and other small flies. Like many orchids, it requires a fungal associate to germinate, and mature plants continue to obtain some of their nutrients from the fungal partner. The species is widely distributed across the Circumboreal Region in Europe, Asia, and North America, where it grows primarily in bogs. Many populations are small and geographically isolated, and the total number of plants is in decline due to habitat loss and degradation. Although assessed as a Least-concern species by the IUCN, H. paludosa is considered threatened or endangered through much of its range. (Full article...)