|Jepson Flora Project: Jepson Interchange|
|TREATMENT FROM THE JEPSON MANUAL (1993)||
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Jepson Interchange (more information)
©Copyright 1993 by the Regents of the University of California
AND IS MAINTAINED FOR ARCHIVAL PURPOSES ONLY
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) 1many; 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: 650900 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.
Perennial, generally from rhizomes
Leaf: ligule membranous; blade flat or rolled, strongly ribbed above, glabrous or hairy
Inflorescence generally spike-like (panicle-like in L. condensatus), dense, generally > upper cauline leaves; some nodes with 2+, generally sessile spikelets
Spikelet: glumes < spikelet, lanceolate, membranous, flexible or narrowly lanceolate to awl-like, stiff; axis breaking above glumes and between florets; florets 27; lemma acute to short-awned; palea < lemma; anthers 2.57 mm
Species in genus: 31 species: North America., Eurasia
Etymology: (Anagram of Elymus)
Reference: [Barkworth & Atkins 1984 Amer J Bot 71:609625]
Some species important in revegetation, often on saline soils. Sometimes treated in Elymus.
Plant from rhizomes
Stem 4.513 dm, glabrous to hairy
Leaf: ligule 0.21.3 mm; blade 2.54 mm wide, upper surface finely scabrous
Inflorescence 520 cm, narrow; spikelets 13 per node
Spikelet: glumes 516 mm, awl-like; lemmas 512 mm, glabrous to puberulent, generally awn-tipped, awn generally ± 3 mm
Ecology: Moist, often saline, meadows
Elevation: < 2300 m.
Bioregional distribution: California (except Desert)
Distribution outside California: to Washington, Rocky Mtns, Texas
Flowering time: JunJul
Synonyms: Elymus t. Buckley
Hybridizes with L. condensatus, L. mollis, L. cinereus.
Horticultural information: 4, 5, 6, 15, 16, 17 IRR: 1, 2, 3, 7, 8, 9, 10, 11, 14, 18, 19, 20, 21, 22, 23, 24; GRCVR; also INV; CVS.