What is "pipewort"

Pipewort \Pipe"wort`\, n. (Bot.) Any plant of a genus ( Eriocaulon) of aquatic or marsh herbs with soft grass-like leaves.

n. Any of several aquatic plants of the genus (taxlink Eriocaulon genus noshow=1).

n. aquatic perennial of North America and Ireland and Hebrides having translucent green leaves in a basal spiral and dense buttonlike racemes of minute white flowers [syn: Eriocaulon aquaticum]