Ochrea

An ochrea (Latin ocrea, greave or protective legging), also spelled ocrea, is a plant structure formed of stipules fused into a sheath surrounding the stem. It is typically found in the buckwheat family Polygonaceae and in some members of the orchid family Orchidaceae. In the palm family Arecaceae, it is an extension of the leaf sheath beyond the petiole insertion.

References

↑ "Ocrea". A Grammatical Dictionary of Botanical Latin. Missouri Botanical Garden. Retrieved 7 January 2026.
↑ "Ocrea". New York Botanical Garden. Retrieved 7 January 2026.
↑ Brandbyge J (1993). "Polygonaceae". In Kubitzki K, Rohwer JG, Bittrich V (eds.). Flowering Plants · Dicotyledons. The Families and Genera of Vascular Plants. Vol. 2. Springer, Berlin, Heidelberg. doi:10.1007/978-3-662-02899-5_63. ISBN 978-3-662-02899-5.
↑ "Ocreatus". A Grammatical Dictionary of Botanical Latin. Missouri Botanical Garden. Retrieved 6 January 2026.
↑ Pei, Shengji; Chen, Sanyang; Guo, Lixiu; Dransfield, John; Henderson, Andrew. "Arecaceae". Flora of China. Vol. 23. Retrieved 6 January 2026 – via eFloras.org, Missouri Botanical Garden, St. Louis, Missouri and Harvard University Herbaria, Cambridge, Massachusetts.

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[MOBOT:Ocrea-1] "Ocrea". A Grammatical Dictionary of Botanical Latin. Missouri Botanical Garden. Retrieved 7 January 2026.

[NYBG-2] "Ocrea". New York Botanical Garden. Retrieved 7 January 2026.

[Brandbyge_1993-3] Brandbyge J (1993). "Polygonaceae". In Kubitzki K, Rohwer JG, Bittrich V (eds.). Flowering Plants · Dicotyledons. The Families and Genera of Vascular Plants. Vol. 2. Springer, Berlin, Heidelberg. doi:10.1007/978-3-662-02899-5_63. ISBN 978-3-662-02899-5.

[MOBOT:Ocreatus-4] "Ocreatus". A Grammatical Dictionary of Botanical Latin. Missouri Botanical Garden. Retrieved 6 January 2026.

[FoC-5] Pei, Shengji; Chen, Sanyang; Guo, Lixiu; Dransfield, John; Henderson, Andrew. "Arecaceae". Flora of China. Vol. 23. Retrieved 6 January 2026 – via eFloras.org, Missouri Botanical Garden, St. Louis, Missouri and Harvard University Herbaria, Cambridge, Massachusetts.