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An ochrea (
An ochrea (Latin
Latin (, or , ) is a classical language belonging to the Italic branch of the Indo-European languages. Latin was originally a dialect spoken in the lower Tiber area (then known as Latium) around present-day Rome, but through the power of the ...
''ocrea'', greave
A greave (from the Old French ''greve'' "shin, shin armour") or jambeau is a piece of armour that protects the leg.
Description
The primary purpose of greaves is to protect the tibia from attack. The tibia, or shinbone, is very close to the skin ...
or protective legging), also spelled ocrea, is a plant structure formed of stipule
In botany, a stipule is an outgrowth typically borne on both sides (sometimes on just one side) of the base of a leafstalk (the petiole). Stipules are considered part of the anatomy of the leaf of a typical flowering plant, although in many speci ...
s fused into a sheath surrounding the stem, and is typically found in the Polygonaceae
The Polygonaceae are a family of flowering plants known informally as the knotweed family or smartweed—buckwheat family in the United States. The name is based on the genus ''Polygonum'', and was first used by Antoine Laurent de Jussieu in 1789 ...
.
In palms it denotes an extension of the leaf sheath beyond the petiole insertion.
References
Plant morphology {{botany-stub