anemone riparia(n = noun.plant) longheaded thimbleweed - thimbleweed of northern North America;
is a kind of anemone cylindrica, thimbleweed

alpine anemone, anchusa riparia, anemone, anemone canadensis, anemone cylindrica, anemone fish, anemone ludoviciana, anemone nemorosa, anemone occidentalis, anemone pulsatilla, anemone quinquefolia, anemone sylvestris, anemone tetonensis, anemone virginiana, canada anemone, clown anemone fish, false rue anemone, genus anemone, genus riparia, mountain anemone, prairie anemone, riparia, riparia riparia, rue anemone, sea anemone, snowdrop anemone, wood anemone