Stipule
/STIP-yool/🔬 Anatomy●● Intermediate
A paired outgrowth found at the base of the petiole where it joins the stem. Stipules vary widely in form — they can be leaf-like, thorny (as in black locust), tendril-like, or sheath-like. Some fall off early (caducous) while others persist.
Etymology
From Latin stipula, meaning "stalk, straw."
Example
“Rose stems have conspicuous stipules fused to the base of each leaf petiole.”