A sheath formed at the node of a stem by the fusion of two stipules, found in many plants of the family Polygonaceae, such as rhubarb.
A tubelike covering around some stems, formed of the united stipules: found esp. in the buckwheat family.
Origin of ocrea
- Latin greave
From American Heritage Dictionary of the English Language, 5th Edition
- From Latin ocrea (“greave, legging")