An Illustrated Guide to ARIZONA WEEDS
The University of Arizona Press
CROWNBEARD, golden crownbeard
CROWNBEARD - Verbesina encelioides Gray var. exauriculata Rob. & Greenm.
DESCRIPTION-A grayish-green branching annual with a rank odor, from a taproot, 1 to 4 feet high reproducing only by seed. The irregularly toothed leaves are densely gray-hairy beneath, green above. The lower leaves are opposite, narrowly triangular, 2 to 8 inches long including the long stalks, which do not have a pair of basal lobes. The other leaves are alternate, lanceshaped, shorter, often with a pair of narrow leaflike lobes, one on each side of the stalk where it joins the stem. The flower heads are on long stalks, ] to 1 3/4 inch across, including the 10 to 15 rays. The ray flowers are yelloworange, deeply 3-notched at the apex, and 1/3 to 1/2 inch long. The central or disk flowers are also yellow and tubular.The achenes are flattened, covered with fine soft hairs, gray-brown, about 1/4 inch long, broadly winged along each margin, with somewhat corklike wings. There are 2 short awns, one on each side at the tip of the achene.
DISTRIBUTION-A weed of disturbed soil, crownbeard is introduced into the southwestern United States from the Old World. Primarily a weed of roadsides and waste places, forming showy masses along the highways and byways through- out Arizona, particularly after the onset of the summer rains; up to 7,000 feet elevation, but usually much lower; flowering April to December, but mostly in late summer.
Copyright (c) 1972 The Arizona Board of Regents