Asteraceae

Erigeron bonariensis

Common Names: Flax-leaved horseweed Synonyms: Conyza bonariensis

Plant Form: Erect annual herb. Size: Up to 1m tall. Stem: Usually unbranched below the flowerhead, densely hairy. Leaves: Alternate, undivided, linear or wider in end half, toothed, hairy. Often twisted in appearance. Flowers: Hemispherical to flask-shaped daisy flowerheads 8-22 mm across in groups of 5-6, in rich, often narrowly pyramid shaped flowerhead. Fruit and Seeds: With white to pinkish, rough parachuting hairs about 3 mm long. Habitat: Disturbed sites, roadsides, pastures, waste areas. Distinguishing Features: Conyza sumatrensis grows taller, its spent flowerheads are darker inside, and its seeds have brown parachuting hairs. Impacts: Outcompetes cropping species and native vegetation.

Leaves are wriggly