Aristida adscensionis L.
Sixweeks Threeawn

Habit: 		Annual, freely branched at the base.
Culms: 		10-80 cm. tall, branched, erect or spreading.
Blades: 	5-15 cm. long, 2 mm. wide or less, more flat on larger plants, involute in smaller.
Sheaths: 	Mostly shorter than the internodes.
Ligule: 	Small, hairy.
Inflorescence: 	Panicles narrow and usually rather compact, erect or somewhat nodding, 5-17 cm. long,
		branches at fist strict, later more or less spreading, spikelets crowded on short branchlets.
Spikelets: 	8-10 mm. long, 1-flowered, narrow.
Glumes: 	1-nerved, first 4-7 mm. long, obtuse or acutish, scabrous on the keel, second 7-10 mm. long,
		narrowed into bluntish notches or acute point, the keel slightly scabrous towards the tip.
Lemmas: 	About as long as the second glume, 6-10 mm. long, densely short hairy on the obtuse callus,
		flattened towards the scarcely beaked summit, scabrous above at least on the keel, slightly longer,
		10-16 mm. long, all divergent at angle as much as 45o or more, flat, not twisted at the base,
		gradually narrowed to a fine terete point.
Palea: 		Thin, included by the lemma.
Habitat: 	Dry open ground.  May-September.
Kansas Range: 	Southwestern Kansas.
Synonyms:	Aristida adscensionis L. var. abortiva Beetle
		Aristida adscensionis L. var. modesta Hack.
		Aristida fasciculata Torr.