|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.
Stem generally erect
Leaf: ligule membranous, sometimes long-ciliate, blade generally flat
Inflorescence panicle-like, generally narrow; branches generally ascending
Spikelet: glumes > floret (except awn), tapered below midpoint; axis breaking above glumes; floret 1, generally cylindric; callus blunt or sharp, hairs stiff; lemma stiffly membranous to hard, evenly hairy or glabrous above, awned from tip; awn > 10 mm, persistent, with 12 bends, or < 10 mm, readily deciduous, ± straight; palea < lemma, hairy, veined
Species in genus: ± 75 species: temp worldwide
Etymology: (Greek: awned scale, from lemma)
Segregated mostly from Stipa ; see also Hesperostipa, Nassella.
Stem 521 dm, glabrous to hairy
Leaf: sheath ciliate at top, hairs 12.5 mm; blade 2.57 mm wide
Inflorescence 1560 cm; branches widely spreading to ascending
Spikelet: glumes unequal, lower 1621 mm, upper 1118 mm; floret 6.510 mm; callus blunt; lemma 1.21.7 X palea length, hairs 1.55 mm, awn 2545 mm, bent twice
Ecology: Gravelly, rocky slopes, chaparral
Elevation: < 1550 m.
Bioregional distribution: South Coast Ranges, Southwestern California
Distribution outside California: Baja California
Synonyms: Stipa c. Thurber
Horticultural information: DRN, DRY, SUN: 7, 11, 14, 15, 16, 17, 19, 20, 21, 22, 23; STBL.