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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  • Up-to-date information about California vascular plants is available from the Jepson eFlora.

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.

BRIZA

QUAKING GRASS

Dieter H. Wilken

Annual, perennial herb
Stems ascending to erect, 1(–6)
Leaves basal to cauline; ligules membranous to translucent; blades flat
Inflorescence panicle-like, open
Spikelets erect to pendent, ± compressed, subconic to ovoid; glumes subequal, papery, rounded at tip, 3–9-veined; florets 6–20, breaking above glumes and between florets; lemma width > length, papery to translucent, rounded at tip, 7–9-veined; palea ± = lemma
Species in genus: 10–12 species: Eur, n Africa
Etymology: (Greek: a kind of grain)

Introduced

B. minor L.

Annual
Stems 1–8, 10–50 cm
Leaf: ligule 3–6 mm, blade 3–10 mm wide
Inflorescence 3–20 cm
Spikelets generally > 15 per inflorescence, 2–5 mm, erect, subconic, truncate at base; glumes 1.5–4 mm, 3–5-veined; florets 4–6; lemmas 1–2 mm
Chromosomes: 2n=10
Ecology: Shaded or moist, open sites
Elevation: 20–600 m.
Bioregional distribution: North Coast, Outer North Coast Ranges, n&c Sierra Nevada Foothills, s Sacramento Valley, n San Joaquin Valley, Central Coast, San Francisco Bay Area, n Outer South Coast Ranges, Sonoran Desert (Rancho Mirage)
Distribution outside California: to Oregon, e US; native to s&w Europe
Flowering time: Apr–Jul

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bioregional map for BRIZA%20minor being generated
 
N.B. The distribution depicted here differs from that given in The Jepson Manual (1993)

Retrieve Jepson Interchange Index to Plant Names entry for Briza minor
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