TREATMENT FROM THE JEPSON MANUAL (1993) |
previous taxon |
next taxon
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. |
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
Stems 115, generally solitary, sometimes tufted, glabrous to puberulent
Leaves ± basal; collar glabrous to puberulent; ligule < 1 mm, membranous; blade thread-like, flat to rolled
Inflorescence panicle-like
Spikelet bisexual, 35 mm; glumes > lower floret, translucent, keel scabrous; callus short-bristly; axis breaking above glumes and between florets; florets 2; lemma faintly 35-veined, generally glabrous, tip with 2 slender teeth, slightly scabrous, awned at or below the middle, awn bent once, exserted (sometimes reduced or 0 in lower floret); palea slightly < lemma
Species in genus: ± 10 species: s Eur
Etymology: (Greek: a grass)
Introduced |
Stems 112, 525 cm, generally glabrous
Leaf: sheath glabrous to slightly scabrous; ligule slightly scabrous
Inflorescence < 1 cm wide, narrow
Spikelet generally 4 mm; glumes 23 mm; lemmas ± 2 mm; awns 34 mm
Chromosomes: 2n=14
Ecology: Sandy soils, open sites
Elevation: < 100 m.
Bioregional distribution: North Coast, s Outer North Coast Ranges
Distribution outside California: to British Columbia, eastern US; native to s Europe