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Piptatherum

Piptatherum
Family: Poaceae
Piptatherum image
  • FNA
  • Resources
Mary E. Barkworth. Flora of North America
Plants perennial; cespitose or soboliferous, sometimes rhizomatous. Culms 10-140(150) cm, erect, usually glabrous, usually smooth; nodes 1-6; branching intra- or extravaginal at the base, not branching above the base; prophylls concealed by the leaf sheaths. Leaves sometimes basally concentrated; cleistogenes not present; sheaths open, glabrous, smooth to scabrous; auricles absent; ligules 0.2-15 mm, membranous to hyaline; blades 0.5-16 mm wide, flat, involute, valvate, or folded, often tapering in the distal 1/3, apices acute to acuminate, not stiff, basal blades not overwintering, sometimes not developed, flag leaf blades well developed, longer than 1 cm. Inflorescences 3-40 cm, terminal panicles, open or contracted; branches straight or flexuous, usually scabrous, rarely smooth; pedicels often appressed to the branches. Spikelets 1.5-7.5 mm, with 1 floret; rachillas not prolonged beyond the floret; disarticulation above the glumes, beneath the floret. Glumes from 1 mm shorter than to exceeding the florets, subequal or the lower glumes longer than the upper glumes, membranous, 1-9-veined, veins evident, apices obtuse to acute or acuminate; florets 1.5-10 mm, usually dorsally compressed, sometimes terete; calluses 0.1-0.6 mm, glabrous or with hairs, blunt; lemmas 1.2-9 mm, smooth, coriaceous or stiffly membranous, tawny or light brown to black at maturity, 3-7-veined, margins flat, separated and parallel for their whole length at maturity, apices not lobed or lobed, glabrous or hairy, hairs about 0.5 mm, not spreading, awned, lemma-awn junction evident; awns 1-18(20) mm, centric, often caducous, almost straight to once- or twice-geniculate, scabrous; paleas as long as or slightly longer than the lemmas, similar in texture and pubescence, 2(3)-veined, not keeled over the veins, flat between the veins, veins terminating near the apices, apices often pinched; anthers 3, 0.6-5 mm, sometimes penicillate; styles 2 and free to their bases, or 1 with 2-3 branches. Caryopses glabrous, ovoid to obovoid; hila 1/2 as long as to equaling the length of the caryopses. x = 11, 12. Name from the Greek pipto, 'fall', and ather, 'awn'.
Species within inventory project: Arizona Flora
Piptatherum aequiglume
Media resource of Piptatherum aequiglume
Map not
Available
Piptatherum angustifolium
Media resource of Piptatherum angustifolium
Map not
Available
Piptatherum caerulescens
Media resource of Piptatherum caerulescens
Map not
Available
Piptatherum coerulescens
Media resource of Piptatherum coerulescens
Map not
Available
Piptatherum confine
Media
not available
Map not
Available
Piptatherum fumeauxii
Media
not available
Map not
Available
Piptatherum gracile
Media resource of Piptatherum gracile
Map not
Available
Piptatherum holciforme
Media resource of Piptatherum holciforme
Map not
Available
Piptatherum laterale
Media resource of Piptatherum laterale
Map not
Available
Piptatherum latifolium
Media
not available
Map not
Available
Piptatherum microcarpum
Media resource of Piptatherum microcarpum
Map not
Available
Piptatherum molinioides
Media resource of Piptatherum molinioides
Map not
Available
Piptatherum munroi
Media resource of Piptatherum munroi
Map not
Available
Piptatherum paradoxum
Media resource of Piptatherum paradoxum
Map not
Available
Piptatherum purpurascens
Media
not available
Map not
Available
Piptatherum setosum
Media
not available
Map not
Available
Piptatherum songaricum
Media resource of Piptatherum songaricum
Map not
Available
Piptatherum soongoricum
Media resource of Piptatherum soongoricum
Map not
Available
Piptatherum virescens
Media resource of Piptatherum virescens
Map not
Available
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This project was made possible in part by the Institute of Museum and Library Services [MG-70-19-0057-19].

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