Widespread European weed with spiny tongue-shaped leaves and yellow flowers; naturalized in United States.

synonyms: bristly oxtongue, bugloss, oxtongue, Picris echioides.

Dutch: ossentong, ossetong
Polish: goryczel

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

synonyms: ambrosia, ragweed.

Polish: ambrozja