Difference between revisions of "Aristida ternipes"
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|subfamily=Poaceae subfam. Aristidoideae | |subfamily=Poaceae subfam. Aristidoideae | ||
|tribe=Poaceae tribe Aristideae | |tribe=Poaceae tribe Aristideae | ||
Latest revision as of 17:59, 11 May 2021
Plants perennial; cespitose. Culms 25-120 cm, wiry, erect to sprawling, unbranched. Leaves basal and cauline; sheaths usually longer than the internodes, glabrous; collars glabrous or strigillose; ligules less than 0.5 mm; blades 5-40 cm long, 1-2.5 mm wide, flat to folded, straight to lax at maturity, adaxial surfaces with scattered, 1.5-3 mm hairs near the ligule. Inflorescences paniculate, 15-40 cm long, (8)10-35(45) mm wide; rachis nodes glabrous or strigillose; primary branches 5-25 cm, remote, stiffly ascending to divaricate, with axillary pulvini, usually naked near the base; secondary branches and pedicels usually appressed. Spikelets usually congested. Glumes 9-15 mm, subequal, 1-veined, acuminate; calluses 1-1.2 mm; lemmas 9-15 mm long, smooth to tuberculate-scabrous, narrowing to slightly keeled, usually not twisted, 0.1-0.2 mm wide apices, junction with the awns not evident; awns not disarticulating at maturity, unequal or almost equal; central awns 8-25(30) mm, straight to arcuate at the base; lateral awns absent or to 0-23 mm; anthers 3, 1.2-2.4 mm. Caryopses 6-8 mm, light brownish. 2n = 22, 24.
Distribution
Calif., Ariz., N.Mex., Tex.
Discussion
Selected References
None.
Key
| 1 | Lateral awns 2-23 mm long | Aristida ternipes var. gentilis |
| 1 | Lateral awns 0-2 mm long | Aristida ternipes var. ternipes |