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Hesperostipa
Family: Poaceae
Hesperostipa image
Max Licher
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Mary E. Barkworth. Flora of North America
Plants perennial; cespitose, not rhizomatous. Culms 12-110 cm, erect, not branching at the upper nodes; prophylls shorter than the sheaths. Leaves not overwintering, not basally concentrated; cleistogenes not developed; sheaths smooth; auricles absent; ligules membranous, frequently ciliate; blades 4-40 cm long, 0.5-4.5 mm wide, usually tightly involute, adaxial surfaces conspicuously ridged, apices narrowly acute, not sharp. Inflorescences terminal panicles, contracted or open. Spikelets 15-60 mm, with 1 floret; rachillas not prolonged beyond the base of the floret; disarticulation above the glumes and beneath the floret. Glumes 15-60 mm long, 2-4 mm wide, tapering from near the base to a hairlike tip; florets 7-25 mm, narrowly cylindrical; calluses 2-6 mm, sharp, densely strigose distally; lemmas indurate, smooth, margins flat, slightly overlapping at maturity, the upper portion fused into a papillose, ciliate crown, awned, lemma-awn junction distinct; awns 50-225 mm, persistent, twice-geniculate, often weakly so, lower segments twisted and scabrous to pilose, terminal segment not twisted, usually scabridulous or pilose; paleas equal to the lemmas, flat, pubescent, coriaceous, 2-veined, veins terminating at the apices, apices indurate, prow-tipped; anthers 3, 1.2-9 mm. Caryopses fusiform, not ribbed. x = 11. Name from the Greek hesperos, 'west', and the generic name Stipa.
Species within checklist: Verde Valley Botanical Area
Hesperostipa comata
Image of Hesperostipa comata
Hesperostipa neomexicana
Image of Hesperostipa neomexicana
The National Science Foundation
Development supported by National Science Foundation Grants (DBI 9983132, BRC 0237418, DBI 0743827, DBI 0847966)
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