Family: Asteraceae Scientific name: Conyza canadensis Description: Plant Form Erect annual herb to 150 cm tall, usually unbranched below inflorescence. Leaves undivided, oblong, entire or finely toothed, 20-100 x 3-8 mm. Flowerheads many in large pyramidal panicle, 3-4 mm long 3-4 mm diam. Fruits pale, minutely hairy, with pappus (parachuting hairs) ca. 4 mm long. Distinguishing Features More gracile than Conyza bonariensis and C. sumatrensis, and with distinctive, white ray florets.