|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.
Annual to perennial herb
Leaves basal and cauline; sheath closed, generally hairy; ligule generally < 5 mm, membranous, entire to fringed; blade flat to inrolled
Inflorescence generally panicle-like, open to dense; spikelet stalk generally stiff, rigid
Spikelet strongly compressed to cylindric; axis breaking above glumes and between florets; glumes unequal, generally < lower floret, lower generally 13-veined, upper 37-veined, back rounded to keeled, tip acute; lemmas faintly 59-veined, tip generally 2-toothed, short-pointed to straight-awned from between teeth; palea generally < lemma
Species in genus: ± 150 species: temp worldwide
Etymology: (Greek: ancient name)
Reference: [Stebbins 1947 Contr Gray Herb 165:4255; Wagnon 1952 Brittonia 7:415480]
Native species need careful study.
Perennial 55140+ cm
Leaf glabrous to short-hairy; blade 417 mm wide
Inflorescence 727 cm, open; branches nodding to spreading, upper ± ascending
Spikelet compressed; glumes glabrous to puberulent, lower 49 mm, 3-veined, upper 611 mm, 57-veined; florets 511; lemma body 915 mm, back rounded, 57-veined, puberulent or glabrous above middle, densely puberulent below middle near margin, tip obtuse to minutely lobed, awn 3.57 mm; anthers 35 mm
Ecology: Shrubland, coniferous forest
Elevation: 1002500 m.
Bioregional distribution: Northwestern California, Cascade Range, Sierra Nevada, Central Western California, South Coast, Channel Islands, Western Transverse Ranges, Peninsular Ranges
Distribution outside California: to Washington, Baja California
Plants from CW and SW < 900 m, with glumes and lemmas evenly puberulent, have been called B. pseudolaevipes Wagnon.