EcoFlora - Avena

Avena
Family: Poaceae Max Licher	FNA Gleason & Cronquist Resources Bernard R. Baum. Flora of North America Plants annual or perennial. Culms 8-200 cm, erect or decumbent. Sheaths open; auricles absent; ligules membranous; blades usually flat, sometimes involute, lax. Inflorescences panicles, diffuse, sometimes 1-sided. Spikelets 15-50 mm, laterally compressed, with 1-6(8) florets; rachillas not prolonged beyond the uppermost floret; disarticulation above the glumes, usually also between the florets, or cultivated forms not disarticulating. Glumes usually exceeding the florets, membranous, glabrous, 3-11-veined, acute; calluses rounded to pointed, with or without hairs; lemmas usually indurate and enclosing the caryopses at maturity, 5-9-veined, often with twisted, strigose hairs below midlength, apices dentate to bifid or biaristate, awns (if present) dorsal, usually once-geniculate and strongly twisted in the basal portion; paleas bifid or entire, ciliate on the keels; lodicules 2, free, glabrous, toothed or not toothed; anthers 3; ovaries hairy. Caryopses terete, ventrally grooved, pubescent; hila linear. x = 7. Name from the Latin avena, oats. ©Utah State University. Reproduced by permission. Vascular plants of NE US and adjacent Canada Spikelets 2-5-fld, articulated above the glumes and usually between the lemmas; rachilla often hirsute, at least at the base of the lemmas; glumes nearly equal, membranous or chartaceous, exceeding the lemmas, mostly 5-11-veined; lemmas indurate, tapering to an entire or often 2-toothed tip, firm below, often scarious distally, rounded on the back, obscurely 5-9-veined or prominently so distally; awn arising from the back of the lemma, often geniculate near the middle, or wanting; annuals with broad flat lvs and ample panicles of large, often nodding spikelets. As now limited, ca 15 spp. of Eurasia. 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.
<< 1 - 50 taxa >> Avena abyssinica Map not Available Avena agadiriana Media not available Map not Available Avena alba Media not available Map not Available Avena aristidoides Map not Available Avena atlantica Media not available Map not Available Avena barbata Map not Available Avena brevis Map not Available Avena canariensis Map not Available Avena capensis Media not available Map not Available Avena clauda Media not available Map not Available Avena colorata Media not available Map not Available Avena diffusa Map not Available Avena elegans Media not available Map not Available Avena elephantina Media not available Map not Available Avena eriantha Media not available Map not Available Avena fatua Map not Available Avena flavescens Map not Available Avena fragilis Map not Available Avena hirtula Media not available Map not Available Avena hispanica Media not available Map not Available Avena hybrida Map not Available Avena lanata Media not available Map not Available Avena loeflingiana Map not Available Avena longepedicellata Map not Available Avena longepilosa Map not Available Avena longiglumis Map not Available Avena lupulina Media not available Map not Available Avena lusitanica Media not available Map not Available Avena macrostachya Media not available Map not Available Avena magna Media not available Map not Available Avena maroccana Media not available Map not Available Avena maxima Media not available Map not Available Avena micrantha Map not Available Avena montana Map not Available Avena mortoniana Map not Available Avena murphyi Media not available Map not Available Avena nuda Map not Available Avena occidentalis Media not available Map not Available Avena pallida Media not available Map not Available Avena papillosa Media not available Map not Available Avena pilosa Media not available Map not Available Avena planiculmis Media not available Map not Available Avena prostrata Media not available Map not Available Avena pubescens Map not Available Avena sativa Map not Available Avena smithii Map not Available Avena spicata Map not Available Avena sterilis Map not Available Avena strigosa Map not Available Avena trichophylla Media not available Map not Available