Jepson Flora Project: Jepson Interchange    

 
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Jepson Interchange (more information)
©Copyright 1993 by the Regents of the University of California
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POACEAE

GRASS FAMILY

James P. Smith, Jr., except as specified

Annual to bamboo-like; roots generally fibrous
Stem generally round, hollow; nodes swollen, solid
Leaves alternate, 2-ranked, generally linear; sheath generally open; ligule membranous or hairy, at blade base
Inflorescence various (of generally many spikelets)
Spikelet: glumes generally 2; florets (lemma, palea, flower) 1–many; lemma generally membranous, sometimes glume-like; palea generally ± transparent, ± enclosed by lemma
Flower generally bisexual, minute; stamens generally 3; stigmas generally 2, generally plumose
Fruit: achene-like grain
Genera in family: 650–900 genera; ± 10,000 species: worldwide; greatest economic importance of any family (wheat, rice, maize, millet, sorghum, sugar cane, forage crops, ornamental, weeds; thatching, weaving, building materials)
Reference: [Hitchcock 1951 Manual grasses US, USDA Misc Publ 200; Clayton & Renvoise 1986 Kew Bull Add Series 13]
See Glossary p. 26 for illustrations of general family characteristics. Generally wind-pollinated.

AEGILOPS

GOATGRASS

Mary E. Barkworth

Annual
Stem generally erect to abruptly bent at base, generally glabrous
Leaf: sheath appendaged; ligule membranous; blade flat, spreading
Inflorescence spike-like, generally cylindric, ± open to dense; spikelets 2-ranked, 1 per node, lower generally vestigial
Spikelet: glumes, lemmas toothed, generally awned; glumes thick, hard, 3+ -veined; axis breaking above glumes and between florets; lemma firm, flat or rounded, veins parallel, not converging; anthers 1.5–4 mm
Species in genus: 27 species: Medit, sw&c Asia
Etymology: (Latin: ancient name for wheat)
Reference: [Kimber & Feldman 1987 Univ of Missouri Spec Rep 353]
Sometimes included in Triticum , wheat.

Introduced

A. triuncialis L.

BARBED GOATGRASS


Stem 17–45 cm
Inflorescence 2–5.5 cm; axis breaking apart in fruit; spikelets generally not sunken in axis
Spikelet: glumes of lowermost spikelet 2–3 awned; glumes of upper spikelets 3-awned, awns generally 4–8 cm; florets generally 4, upper 2 generally sterile; lemmas short-awned or awn 0
Chromosomes: 2n=28
Ecology: Disturbed sites, cultivated fields, roadsides
Elevation: < 1000 m.
Bioregional distribution: s North Coast Ranges, Cascade Range Foothills, n&c Sierra Nevada Foothills, Sacramento Valley, n Central Western California
Distribution outside California: native to Mediterranean Europe, w Asia
Weedy.

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bioregional map for AEGILOPS%20triuncialis being generated
 
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Retrieve Jepson Interchange Index to Plant Names entry for Aegilops triuncialis
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