Isodon
Genus of flowering plants
Isodon (teacost ) is a genus of flowering plants in the family Lamiaceae described in 1840. It is native to tropical and subtropical parts of the Old World , primarily Asia but two species are from Africa . Many of the species are endemic to China , where it is called xiangchacai or "fragrant tea". In China, a rapid radiation of Isodon occurred during the Pliocene that coincided with a shift from herbs inhabiting humid areas to shrubs inhabiting dry valleys.
Species
Isodon adenanthus - Guizhou, Sichuan, Yunnan
Isodon adenolomus - Sichuan, Yunnan
Isodon albopilosus - Sichuan
Isodon amethystoides - S China and Taiwan
Isodon angustifolius - Yunnan
Isodon × arakii - Japan
Isodon assamicus - Assam
Isodon atroruber - Bhutan
Isodon barbeyanus - Sichuan
Isodon brevicalcaratus - Guangdong
Isodon brevifolius - Yunnan
Isodon bulleyanus - Yunnan
Isodon calcicola - Yunnan
Isodon capillipes - Sri Lanka
Isodon coetsa - China, Tibet, Indian Subcontinent, Indochina, Indonesia, Philippines
Isodon colaniae - Laos
Isodon dawoensis - Sichuan
Isodon dhankutanus - Nepal
Isodon effusus - Japan
Isodon enanderianus - Sichuan, Yunnan
Isodon eriocalyx - Myanmar, Thailand, SW China
Isodon excisoides - Hubei, Sichuan, Yunnan
Isodon excisus - Primorye, Korea, Japan, NE China
Isodon flabelliformis - Sichuan, Yunnan
Isodon flavidus - Guizhou, Yunnan
Isodon flexicaulis - Sichuan, Yunnan
Isodon forrestii - Sichuan, Yunnan
Isodon gesneroides - Sichuan
Isodon gibbosus - Guizhou, Sichuan
Isodon glaucocalyx
Isodon glutinosus - Sichuan, Yunnan
Isodon grandifolius - Sichuan, Yunnan
Isodon grosseserratus - Sichuan
Isodon henryi - S China
Isodon hirtellus - Sichuan, Yunnan
Isodon hispidus - Bhutan, Assam, Bangladesh, Myanmar, Thailand, Yunnan, Laos
Isodon × inamii - Japan
Isodon inflexus - China, Korea, Japan
Isodon interruptus - Yunnan
Isodon irroratus - Yunnan, Tibet
Isodon japonicus - China, Korea, Japan, Primorye, Amur
Isodon kurzii - Sikkim
Isodon latifolius - Sichuan
Isodon leucophyllus - Sichuan, Yunnan
Isodon liangshanicus - Sichuan
Isodon lihsienensis - Sichuan
Isodon longitubus - Anhui, Zhejiang, Japan
Isodon lophanthoides - China, Indian Subcontinent, Indochina
Isodon loxothyrsus - Sichuan, Tibet, Yunnan
Isodon lungshengensis - Guangxi
Isodon macrocalyx - S China incl Taiwan
Isodon macrophyllus - Anhui, Jiangsu
Isodon medilungensis - Sichuan
Isodon meeboldii - Myanmar, Thailand
Isodon megathyrsus - Sichuan, Yunnan
Isodon melissoides - Arunachal Pradesh, Yunnan, Bhutan, Assam, Bangladesh
Isodon mucronatus - Sichuan
Isodon muliensis - Sichuan
Isodon myriocladus - Guangxi, Guangdidong, Sichuan
Isodon namikawanus - Nepal
Isodon nervosus - SE + SW China
Isodon nigrescens - S India, Sri Lanka
Isodon nilgherricus - S India
Isodon × ohwii - Japan
Isodon oreophilus - Yunnan
Isodon oresbius - Sichuan, Yunnan
Isodon pantadenius - Yunnan
Isodon parvifolius - Gansu, Shaanxi, Sichuan, Tibet
Isodon pharicus - Sichuan, Tibet, Nepal, Bhutan
Isodon phulchokiensis - Nepal
Isodon phyllopodus - Guizhou, Sichuan, Tibet, Yunnan
Isodon phyllostachys - Sichuan, Yunnan
Isodon pleiophyllus - Yunnan
Isodon racemosus - Hubei, Sichuan, Thailand
Isodon ramosissimus - tropical Africa
Isodon repens - Himalayas
Isodon rivularis - S India
Isodon rosthornii - Guizhou, Sichuan, Yunnan
Isodon rubescens - S + C China
Isodon rugosiformis - Yunnan
Isodon rugosus - Oman, Afghanistan, Pakistan, India, Tibet, Nepal, Bhutan, Bangladesh
Isodon schimperi - East Africa from Ethiopia to Uganda
Isodon scoparius - Yunnan
Isodon scrophularioides - Himalayas
Isodon sculponiatus - Himalayas, S China, Vietnam
Isodon secundiflorus - Sichuan
Isodon serra - China, Korea, Primorye
Isodon setschwanensis - Sichuan, Yunnan
Isodon shikokianus - Japan
Isodon silvaticus - Tibet
Isodon smithianus - Sichuan, Tibet
Isodon × suzukii - Japan
Isodon tenuifolius - Sichuan, Yunnan
Isodon ternifolius - Saudi Arabia, Himalayas, S China
Isodon teysmannii - Thailand, Indonesia
Isodon × togashii - Japan
Isodon trichocarpus - Japan
Isodon umbrosus - Japan
Isodon walkeri - Indian Subcontinent, Indochina, S China
Isodon wardii - Tibet
Isodon websteri - Liaoning
Isodon weisiensis - Yunnan
Isodon wightii - S India
Isodon wikstroemioides - Sichuan, Tibet, Yunnan
Isodon xerophilus - Yunnan
Isodon yuennanensis - Sichuan, Tibet
References
1 2 3 Kew World Checklist of Selected Plant Families
1 2 Tropicos, Isodon (Schrad. ex Benth.) Spach
↑ Spach, Édouard. 1840. Histoire Naturelle des Végétaux. Phanérogames 9: 162 descriptions in Latin, commentary in French
↑ Bentham, George. 1832. Labiatarum Genera et Species 40
↑ Flora of China Vol. 17 Page 269 香茶菜属 xiang cha cai shu Isodon (Schrader ex Bentham) Spach, Hist. Nat. Veg. 9: 162. 1840.
↑ Chen, Ya-Ping; Sunojkumar, Purayidathkandy; Spicer, Robert A; Hodel, Richard G J; Soltis, Douglas E; Soltis, Pamela S; Paton, Alan J; Sun, Miao; Drew, Bryan T; Xiang, Chun-Lei (2025-02-01). "Rapid Radiation of a Plant Lineage Sheds Light on the Assembly of Dry Valley Biomes" . Molecular Biology and Evolution . 42 (2) msaf011. doi :10.1093/molbev/msaf011 . ISSN 1537-1719 . PMC 11817785 . PMID 39823311 .
Isodon Plectranthus sect. Isodon