Prairie Threeawn [Aristida oligantha]

Origin: Native to North America
Use: Annual, cool season, native grass that provides poor grazing for wildlife and livestock.
Image: Click to enlarge Click to enlarge Click to enlarge Click to enlarge Click to enlarge Click to enlarge Click to enlarge Click to enlarge Click to enlarge Click to enlarge
Plant Description:
General   
Life Span  Annual
Growth Form  Tufted, wiry, 30-60 cm. tall, branched at base
Management:
Seeding Rate 
40" Rows: 
Broadcast: 
 
Planting Date   
Planting Depth  
pH requirement  
Soil texture 
Sandy: 
Loam: 
Clay: 
 
Cold Tolerance:  
General  Provides poor grazing for wildlife and livestock.
ID Features:
Habit: 		Annual, much branched.
Culms: 		Tufted, wiry, 30-60 cm. tall, branched at base and at all the nodes, 
                smooth or sometimes slightly rough.
Blades: 	3-15 cm. long, 0.5-2 mm. wide, flat or smooth or with a few hairs, involute,
                tapering to a fine point.
Sheaths:	Loose, shorter or longer than the internodes, glabrous or often 
                pilose at the throat.
Ligule: 	Small, hairy.
Inflorescence: 	Panicle loose, raceme like, 10-20 cm. long, the axis often flexuous 
                and the few spikelets spreading.
Spikelets: 	Few, narrow, 1-flowered, on short pedicels (about 1 mm. long), the 
                lower often in pairs, length of parts variable, rachilla disarticulating above 
                the glumes.
Glumes: 	About equal, 2-3 cm. long, tapering into an awn, first 3-7 nerved, 
                with an awn 3-7 mm. long, second 1-nerved, the awn 10 mm. long or more, 
                both scabrous at least on the keel.
Lemmas: 	Exclusive of awn, 17-28 mm. long, 3-nerved, scabrous above, 
                pubescent on the short callus, firm, narrow, rigid, strongly convolute, 
                3-awned at the apex, awns about equal, 3.5-7 cm. long,	the central 
                sometimes a little longer than the lateral ones, divergent, somewhat 
                spirally curved at base.
Palea: 		Thin, included within the lemma.
Habitat: 	Open, dry, sterile soil.  August-October.
Special Notes:
Prairie Threeawn [Aristida oligantha] Information #1