Panicum rigidulum Spreng.
Redtop Panicum

Habit: 		Densely clumped perennial, from a short crown with numerous short leaved shoots at the base.
Culms: 		Stout, 50-100 cm. tall, erect, compressed, glabrous.
Blades: 	20-50 cm. long, 5-10 mm. wide, erect, folded at base, flat above, rough on margins
		and midnerve beneath.
Sheaths: 	Longer than the internodes, keeled, often pilose on the sides at the top.
Ligule: 	Membranous, erose, about 1 mm. long.
Inflorescence: 	Panicles terminal and axillary, finally long exserted, 10-30 cm. long,
		half to two thirds as wide, ovoid, purplish becoming pale, with divergent
		densely flowered branchlets mostly from the lower side, the short pedicels
		appressed, usually bearing at the summit one to several delicate hairs.
Spikelets: 	About 2 mm. long (1.6-2.2), 0.7-0.8 mm. wide, lanceolate, 5-7-nerved, glabrous, acute.
Glumes: 	First half about the length of the spikelet, 3-5-nerved, scabrous on the
		midnerve towards the apex, the second and sterile lemma subequal, 5-nerved,
		the midnerve scabrous at the summit, the sterile palea nearly equal to the fruit.
Fruit: 		1.2-1.3 mm. long, about 0.6 mm. wide, a minute tuft of thickish hairs at the apex.
Habitat: 	Wet meadows, and low places.  July-September.
Kansas Range:	East half.
Remarks: 	The panicles much resemble those of Redtop, Agrostis alba L.
Synonyms:	Panicum rigidulum Bosc ex Nees var. rigidulum
		Panicum agrostoides Spreng.
		Panicum agrostoides Spreng. var. condensum (Nash) Fern.
		Panicum agrostoides Spreng. var. ramosius (C. Mohr) Fern.
		Panicum condensum Nash
		Panicum rigidulum Bosc ex Nees var. condensum (Nash) Mohlenbrock