Ochrea
From Wikipedia, the free encyclopedia
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.[1][2] It is typically found in the buckwheat family Polygonaceae and in some members of the orchid family Orchidaceae.[3][4] In the palm family Arecaceae, it is an extension of the leaf sheath beyond the petiole insertion.[5]
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