Bitterweed — synonyms, definition

1. bitterweed (Noun)

Picris echioides ambrosia bristly oxtongue bugloss oxtongue ragweed

bitterweed (Noun) — Widespread European weed with spiny tongue-shaped leaves and yellow flowers; naturalized in United States.

bitterweed (Noun) — Any of numerous chiefly North American weedy plants constituting the genus Ambrosia that produce highly allergenic pollen responsible for much hay fever and asthma.

weed Ambrosia artemisiifolia Ambrosia psilostachya Ambrosia trifida common ragweed great ragweed perennial ragweed western ragweed Picris genus Ambrosia genus Picris