Setaria glauca (L.) Beauv.
Yellow Bristlegrass

Habit: 		Erect or ascending, glaucous annual.
Culms: 		Erect to prostrate, 30-120 cm. tall, branching at the base, glabrous, flattened, often
		with a purple tinge.
Blades: 	5-15 cm. long or more, 4-10 mm. wide, twisted in a loose spiral, glabrous or with
		scattered long hairs at the base.
Sheaths: 	Shorter than the internodes, keeled.
Ligule: 	Membranous, ciliate, about 1 mm. long.
Inflorescence: 	Dense terminal evenly cylindric spikelike panicles, yellow at maturity,
		mostly 5-10 cm. long, about 1 cm. thick, the axis densely pubescent, bearing spikelets
		subtended by one to several bristles (sterile branchlets).
Spikelets: 	Broadly ovate, awnless, 3 mm. long, flat on one side and strongly convex on the
		other, in a cluster of several sterile upwardly barbed bristle-like persistent
		branches, the longer 2-3 times as long as the spikelet.
Glumes: 	First broad, about half as long as the spikelet, 3-5-nerved, the second
		about two thirds as long as the spikelet, ovate, acute, 5-9-nerved, sterile
		lemma about as long as the fruit, 5-nerved, the lower edges folded around the
		fruit, with well-developed palea but without stamens.
Fertile lemmas:	Broadly ovate, transversely rugose, indurated, obtuse, enclosing a shorter palea.
Fruit: 		Strongly marked with numerous transverse ridges.
Habitat: 	Waste places and cultivatd ground, roadsides.  June-September.
Kansas Range:	Throughout.
Use: 		Common weed, but palatable to livestock.
Synonyms:	Setaria pumila (Poir.) Roemer & J.A. Schultes
		Setaria pumila (Poir.) Roemer & J.A. Schultes ssp. pallidifusca (Schumacher) B.K. Simon
		Setaria glauca sensu Vickery
		Setaria glauca (L.) Beauv. var. pallidifusca (Schumacher) T. Koyama
		Setaria pallidifusca (Schumacher) Stapf & C.E. Hubbard