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Stipa

Stipa
Family: Poaceae
Stipa image
Paul Rothrock
  • FNA
  • Gleason & Cronquist
  • Resources
Mary E. Barkworth. Flora of North America
Plants annual or perennial; tufted or cespitose, not rhizomatous. Culms 10-200 cm, herbaceous, not branching at the upper nodes; basal branching usually intravaginal; prophylls shorter than the sheaths. Leaves mostly basal; cleistogenes usually not developed; sheaths open; auricles absent; ligules membranous, sometimes stiffly so, upper and lower ligules similar or upper ligules longer than those below; blades prominently ribbed, usually tightly convolute when dry. Inflorescences terminal panicles, usually contracted. Spikelets 12-90 mm, with 1 floret; rachillas not prolonged beyond the base of the floret; disarticulation above the glumes, beneath the floret. Glumes much longer than the floret, hyaline to membranous, usually acuminate, 1-3-veined; florets 3-27 mm, terete to slightly laterally compressed; calluses (1)1.5-6 mm, sharp or blunt, antrorsely hairy; lemmas coriaceous to indurate, tan to brown, smooth, glabrous or hairy, hairs sometimes uniformly distributed, sometimes in lines, margins flat, slightly overlapping at maturity, apices awned, lemma-awn junction evident; awns 50-500 mm, persistent, usually once- or twice-geniculate, sometimes plumose in whole or in part, basal segment often strongly twisted; paleas from shorter than to subequal to the lemmas, glabrous, 2-veined, not keeled, flat between the veins, apices sometimes scarious, sometimes similar in texture to the body; lodicules 2 or 3, glabrous or pilose; anthers 3; styles 2(3,4), free at the base, if 3 or 4, then 1 or 2 distinctly shorter. Caryopses fusiform, not ribbed. x = 11. Name from the Latin stipa, 'oakum' (a loose bunch of fibers), alluding both to the feathery inflorescences and the use of Stipa tenacissima L. [ = Macrochloa tenacissima] as a source of cordage.
Vascular plants of NE US and adjacent Canada
Spikelets 1-fld, articulated above the glumes; glumes about equal, lance-linear, papery, with broad scarious margins, the first 3-veined, the second 5-veined, the nerves parallel, only the middle one extending to the often slenderly prolonged tip; lemma shorter than or equaling the glumes, indurate, terete, linear to narrowly fusiform, obscurely nerved or nerveless, villous at least at the base, the margins meeting or overlapping around the membranous palea, and with a bearded, elongate, sharp-pointed callus; awn elongate, terminal, articulated with the lemma but persistent, usually twice geniculate, the lower one or two segments hygroscopic and twisted; perennials with narrow, elongate, often involute lvs and open or contracted panicles of large spikelets. 300, nearly cosmop.

Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.

©The New York Botanical Garden. All rights reserved. Used by permission.
Species within inventory project: Arizona Flora || << 1 - 50 taxa >>
Stipa acuta
Media resource of Stipa acuta
Map not
Available
Stipa airoides
Media resource of Stipa airoides
Map not
Available
Stipa alba
Media
not available
Map not
Available
Stipa alta
Media resource of Stipa alta
Map not
Available
Stipa ambigua
Media resource of Stipa ambigua
Map not
Available
Stipa apertifolia
Media
not available
Map not
Available
Stipa arabica
Media resource of Stipa arabica
Map not
Available
Stipa araxensis
Media resource of Stipa araxensis
Map not
Available
Stipa aristella
Media resource of Stipa aristella
Map not
Available
Stipa aristiglumis
Media
not available
Map not
Available
Stipa arnowiae
Media resource of Stipa arnowiae
Map not
Available
Stipa atlantica
Media
not available
Map not
Available
Stipa avenacea
Media resource of Stipa avenacea
Map not
Available
Stipa avenacioides
Media resource of Stipa avenacioides
Map not
Available
Stipa balansae
Media
not available
Map not
Available
Stipa barbata
Media resource of Stipa barbata
Map not
Available
Stipa basiplumosa
Media
not available
Map not
Available
Stipa bavarica
Media resource of Stipa bavarica
Map not
Available
Stipa borysthenica
Media
not available
Map not
Available
Stipa brachychaeta
Media resource of Stipa brachychaeta
Map not
Available
Stipa breviflora
Media
not available
Map not
Available
Stipa bromoides
Media
not available
Map not
Available
Stipa bungeana
Media resource of Stipa bungeana
Map not
Available
Stipa caduca
Media
not available
Map not
Available
Stipa calamagrostis
Media resource of Stipa calamagrostis
Map not
Available
Stipa californica
Media resource of Stipa californica
Map not
Available
Stipa canadensis
Media
not available
Map not
Available
Stipa canescens
Media resource of Stipa canescens
Map not
Available
Stipa capillacea
Media resource of Stipa capillacea
Map not
Available
Stipa capillata
Media resource of Stipa capillata
Map not
Available
Stipa caragana
Media resource of Stipa caragana
Map not
Available
Stipa caucasica
Media resource of Stipa caucasica
Map not
Available
Stipa caudata
Media resource of Stipa caudata
Map not
Available
Stipa cazorlensis
Media
not available
Map not
Available
Stipa charruana
Media resource of Stipa charruana
Map not
Available
Stipa chrysophylla
Media
not available
Map not
Available
Stipa chubutensis
Media
not available
Map not
Available
Stipa clandestina
Media resource of Stipa clandestina
Map not
Available
Stipa clarazii
Media
not available
Map not
Available
Stipa clausa
Media resource of Stipa clausa
Map not
Available
Stipa conferta
Media
not available
Map not
Available
Stipa constricta
Media resource of Stipa constricta
Map not
Available
Stipa contracta
Media
not available
Map not
Available
Stipa cordobensis
Media
not available
Map not
Available
Stipa curtiseta
Media resource of Stipa curtiseta
Map not
Available
Stipa danubialis
Media resource of Stipa danubialis
Map not
Available
Stipa dasyphylla
Media resource of Stipa dasyphylla
Map not
Available
Stipa desertorum
Media
not available
Map not
Available
Stipa diegoensis
Media resource of Stipa diegoensis
Map not
Available
Stipa divaricata
Media resource of Stipa divaricata
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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