|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
For up-to-date information about California vascular plants, visit the Jepson eFlora.
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 1070 cm, sometimes from rhizomes < 10 cm
Leaves: ligule 1.53 mm; lower blades 1.55 cm, 16 mm wide, flat to inrolled
Inflorescence 520 cm, lanceolate to narrowly ovate in outline, ± open; 1° branches generally ascending, lower 25 cm
Spikelet: glumes 23 mm; callus hairs minute; lemma 1.52.5 mm, sometimes awned near tip, awn < 0.5 mm, straight; palea 0 or minute, << lemma; anthers 0.71.8 mm
Ecology: Common. Open meadows, woodland, forest, subalpine
Elevation: 2003500 m.
Bioregional distribution: California Floristic Province, Great Basin Floristic Province
Distribution outside California: to British Columbia, Montana
Flowering time: JunAug
Synonyms: A. lepida Hitchc.; A. diegoensis Vasey
Geog and ecological variation need study
Horticultural information: DRN, part SHD: 1, 2, 3, 4, 5, 6, 7, 8, 9, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24; deciduous GRCVR.
|YOU CAN HELP US make sure that our distributional information is correct and current. If you know that a plant occurs in a wild, reproducing state in a Jepson bioregion NOT highlighted on the map, please contact us with that information. Please realize that we cannot incorporate range extensions without access to a voucher specimen, which should (ultimately) be deposited in an herbarium. You can send the pressed, dried collection (with complete locality information indicated) to us (e-mail us for details) or refer us to an accessioned herbarium specimen. Non-occurrence of a plant in an indicated area is difficult to document, but we will especially value your input on those types of possible errors (see automatic conversion of distribution data to maps).|