the.com/ocrea
a leafy little sleeve hugging plant stems like nature's compression sock
means In botany, an ocrea is a tubular sheath of fused stipules that wraps around the stem above where a leaf attaches, most famously seen in the knotweed and buckwheat family.
from Straight from Latin ocrea, meaning a greave or legging — the bronze or leather shin-guard a Roman soldier strapped on for battle. Botanists borrowed the word because the plant's stem-sheath looked just like armor for a leg, snug from one node to the next.
- location
- wraps the stem above each leaf joint
- signature plant
- defines the buckwheat family, including rhubarb
- origin
- fused stipules, two leaf-base flaps merged into one
- latin root
- means greave, like ancient shin armor
- function
- shields tender growth and developing buds
for instance
ocrea of rumex — tubular sheath around stem nodes in dock plants, found across temperate regions
ocrea of polygonum — membranous stipular fusion in knotweeds, common throughout northern hemisphere