nodding

The act of one who nods: also used attributively: as, a nodding acquaintance (an acquaintance involving no recognition other than a nod).

Having a drooping position; bending with a quick motion: as, a nodding plume; specifically, in botany, having a short bend in the peduncle below the flower, causing the latter to face downward; cernuous.

Curved so that the apex hangs down; having the top bent downward.

Present participle of nod.

having branches or flower heads that bend downward