|Jepson Flora Project: Jepson Interchange|
|TREATMENT FROM THE JEPSON MANUAL (1993)||
previous taxon |
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 or perennial herb, generally tufted, sometimes from rhizomes or stolons
Stems generally erect
Leaf: sheath generally smooth, glabrous; ligule membranous; blade flat to rolled
Inflorescence panicle-like, densely cylindric to openly ovate
Spikelet: glumes generally subequal, back generally glabrous, vein generally finely scabrous, 1-veined, generally acute; floret 1, < glumes, generally breaking above glumes; callus glabrous to densely hairy; lemma generally 5-veined, veins not converging, sometimes extended as short teeth, awned from back or not; palea 0 to ± = lemma, translucent; anthers generally 3
Species in genus: ± 200 species: especially temp Am, Eurasia
Etymology: (Greek: pasture)
Reference: [Carlbom 1967 PhD OR State Univ]
Some cultivated in pastures, lawns.
Perennial 630 cm, decumbent to erectSee the CNPS Inventory for information about endangerment and rarity.
Leaves: ligule generally 11.5 mm; lower blades 25 cm, generally < 1 mm wide, inrolled
Inflorescence 28 cm, cylindric, dense; base often partly enclosed by upper leaf; 1° branches ascending to appressed, lower generally < 0.5 cm
Spikelet: glumes 1.84 mm; callus glabrous; lemma 1.53 mm, sometimes awned above middle, awn < 0.7 mm, straight; palea ± 0.3 mm, < 1/3 X lemma; anthers 12 mm
Ecology: Dunes, gravelly soils, coastal bluffs, scrub
Elevation: < 100 m.
Bioregional distribution: s North Coast, n Central Coast, n San Francisco Bay Area
Synonyms: var. marinensis B. Crampton, Marin bent grass, CA
May intergrade locally with A. densiflora ; needs study.