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Stipeae

Stipeae
Family: Poaceae
Stipeae image
Keir Morse
  • FNA
  • Resources
Mary E. Barkworth. Flora of North America
Plants usually perennial; usually tightly to loosely cespitose, sometimes rhizomatous. Culms annual or perennial, not woody, branches 1 to many at the upper nodes. Leaves basally concentrated to evenly distributed; sheaths open, margins not fused, sometimes ciliate distally, basal sheaths sometimes concealing axillary panicles (cleistogenes), sometimes wider than the blade; collars sometimes with tufts of hair at the sides extending to the top of the sheaths; auricles absent; ligules scarious, often ciliate, cilia usually shorter than the base, ligules of the lower and upper cauline leaves sometimes differing in size and vestiture; pseudopetioles absent; blades linear to narrowly lanceolate, venation parallel, cross venation not evident, cross sections non-Kranz, without arm or fusoid cells; epidermes of adaxial surfaces sometimes with unicellular microhairs, cells not papillate. Inflorescences usually terminal panicles, occasionally reduced to racemes in depauperate plants, sometimes 2-3 panicles developing from the highest cauline node. Spikelets usually with 1 floret, sometimes with 2-6 florets, laterally compressed to terete; rachillas not prolonged beyond the base of the floret in spikelets with 1 floret, prolonged beyond the base of the distal floret in spikelets with 2-6 florets, prolongation hairy, hairs 2-3 mm; disarticulation above the glumes and beneath the florets. Glumes usually exceeding the floret(s), always longer than 1/4 the length of the adjacent floret, 1-10-veined, narrowly lanceolate to ovate, hyaline or membranous, flexible; florets usually terete, sometimes laterally or dorsally compressed; calluses usually well-developed, rounded or blunt to sharply pointed, often antrorsely strigose; lemmas lanceolate, rectangular, or ovate, membranous to coriaceous or indurate, 3-5-veined, veins inconspicuous, apices entire, bilobed, or bifid, awned, lemma-awn junction usually conspicuous, awns 0.3-30 cm, not branched, usually terminal and centric or eccentric, sometimes subterminal, caducous to persistent, not or once- to twice-geniculate, if geniculate, proximal segment(s) twisted, distal segment straight, flexuous, or curled, not or scarcely twisted; lodicules 2 or 3; anthers 1 or 3, sometimes differing in length within a floret; ovaries glabrous throughout or pubescent distally; styles 2(3-4)-branched. Caryopses ovoid to fusiform, not beaked, pericarp thin; hila linear; embryos less than 1/3 the length of the caryopses. x = 7, 8, 10, 11, 12.
Species within inventory project: Arizona Flora
Achnatherum contractum
Media resource of Achnatherum contractum
Map not
Available
Achnatherum eminens
Media resource of Achnatherum eminens
Map not
Available
Achnatherum lemmonii
Media resource of Achnatherum lemmonii
Map not
Available
Achnatherum lettermanii
Media resource of Achnatherum lettermanii
Map not
Available
Achnatherum lobatum
Media resource of Achnatherum lobatum
Map not
Available
Achnatherum miliaceum
Media resource of Achnatherum miliaceum
Map not
Available
Achnatherum nelsonii
Media resource of Achnatherum nelsonii
Map not
Available
Achnatherum occidentale
Media resource of Achnatherum occidentale
Map not
Available
Achnatherum parishii
Media resource of Achnatherum parishii
Map not
Available
Achnatherum perplexum
Media resource of Achnatherum perplexum
Map not
Available
Achnatherum robustum
Media resource of Achnatherum robustum
Map not
Available
Achnatherum scribneri
Media resource of Achnatherum scribneri
Map not
Available
Hesperostipa comata
Media resource of Hesperostipa comata
Map not
Available
Hesperostipa neomexicana
Media resource of Hesperostipa neomexicana
Map not
Available
Jarava speciosa
Media resource of Jarava speciosa
Map not
Available
Pappostipa speciosa
Media resource of Pappostipa speciosa
Map not
Available
Piptatheropsis micrantha
Media resource of Piptatheropsis micrantha
Map not
Available
Piptochaetium fimbriatum
Media resource of Piptochaetium fimbriatum
Map not
Available
Piptochaetium pringlei
Media resource of Piptochaetium pringlei
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].

EcoFlora is part of the SEINet Portal Network. Learn more here.

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