Jepson Interchange (more information)
Print edition is available from the University of California Press
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This page is based on the 1993 Jepson Manual.
Please see the Jepson eFlora for up-to-date information about California vascular plants. |
| Jepson Flora Project: Jepson Interchange |
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TREATMENT FROM THE JEPSON MANUAL |
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Jepson Interchange (more information) |
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©Copyright 1993 by the Regents of the University of California
Print edition is available from the University of California Press |
| The second edition of The Jepson Manual (2012) is available from the University of California Press | |
| See also the Jepson eFlora, which parallels the Second Edition |
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).[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.
Perennial
Stem generally unbranched
Inflorescence panicle-like; branches generally widely spreading
Spikelet: glumes tapered from near base to tip, tip narrowly acute, generally reddish; axis breaking above glumes; floret 1, generally round in X -section; callus 0.5–4 mm, generally sharp; lemma papillate or minutely tubercled at tip, sometimes hairy, margins strongly overlapping at maturity, tip neck-like, ciliate, generally pale colored; palea < 1/3 lemma length, glabrous, veins 0; anthers ciliate, often of 2 lengths
Species in genus: ± 80 species: Am
Etymology: (Latin: nassa, a basket with a narrow neck)
Reference: [Barkworth 1990 Taxon 39:597–614]
Segregated from Stipa ; see also Achnatherum, Hesperostipa.
| Native |
Stem 3–10 dm
Leaf: blade 0.8–3.5 mm wide
Inflorescence 18–60 cm
Spikelet: glumes subequal, 12–19 mm; floret 7.5–11.5 mm; lemma evenly hairy, becoming glabrous on veins, neck conspicuous, not strongly narrowed at base, awn 38–100 mm, strongly bent twice, distal segment straight
Chromosomes: 2n=64
Ecology: Oak woodland, chaparral, grassland
Elevation: < 1300 m.
Bioregional distribution: Northwestern California, n&c Sierra Nevada Foothills, s Sacramento Valley, Central Western California, South Coast, Channel Islands, Western Transverse Ranges, w Peninsular Ranges
Distribution outside California: Baja California
Synonyms: Stipa p. HitchcHorticultural information: DRN, SUN: 5, 7, 8, 9, 11, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24; also STBL.
| 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). |
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