Ochrea n. : A greave or legging.

Ochrea n. : A kind of sheath formed by two stipules united round a stem.

Example:


Taxonomy
Ochrea, free encyclopedia, leaf sheath, search, Unsourced, ocrea, stipules, stem, diagnostic character, extension, petiole, Personal tools, Interaction, Toolbox, Languages, non-profit organization, botany, articles lacking sources.

Defination from the web:
Ochrea. From Wikipedia, the free encyclopedia. Jump to: navigation, search. The introduction to this article provides ... Ochrea, commonly spelled ocrea, is a structure formed of stipules fused into a sheath surrounding the stem. It is a diagnostic character in the Polygonaceae. ...