| Origin: | Native to North America | |
| Use: | Annual, cool season, native grass that provides poor grazing for wildlife and livestock. | |
| Image: |
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| Plant Description: | ||
| General | ||
| Life Span | Annual | |
| Growth Form | Tufted, wiry, 30-60 cm. tall, branched at base | |
| Management: | ||
| Seeding Rate 40" Rows: Broadcast: |
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| Planting Date | ||
| Planting Depth | ||
| pH requirement | ||
| Soil texture Sandy: Loam: Clay: |
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| 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.
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Special Notes: |
Prairie Threeawn [Aristida oligantha] Information #1 | |