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.
Species in genus: 1 sp
Etymology: (Greek: hard beard, from firm awns)
Reference: [Reeder & Toolin 1987 Phytologia 62:267–275]
| Native |
Perennial, from short stolons, mat-like, generally dioecious or monoecious, rarely bisexual
Stem erect, 1–2 dm
Leaves generally basal, densely tufted; sheath smooth; ligule short-hairy; blade 2–8 cm, 1–3 mm wide, flat, firm, sharp-pointed
Staminate inflorescence 3–7 cm, raceme- or panicle-like
Pistillate inflorescence 10–20 cm, spike-like
Staminate spikelet 1–2.5 cm, compressed; glumes 3–8 mm, ± equal, lanceolate, 1(3)-veined, awn 0; axis breaking above glumes and falling as 1 unit; florets 5–10(20); lemma ± = glumes, 3(5)-veined, short-awned
Pistillate spikelet 8–15 cm including awns; body except awns ± cylindric, generally subtended by 1 bract; bract ± = lower glume; glumes 3-veined, acute, awn 0, lower glume 1–2 cm, upper 1.5–3 cm; axis breaking above glumes and ± between florets; florets 3–5, lower with sharp-pointed callus, upper reduced to awns; lemma 7–11 mm, narrow, awns 3, 6–12 cm, ± spreading to ascending
Chromosomes: 2n=40
Ecology: Open creosote-bush scrub
Elevation: ± 1600 m.
Bioregional distribution: e Desert Mountains (New York Mtns)
Distribution outside California: to Colorado, Texas, Mexico, w S.America
See the CNPS Inventory for information about endangerment and rarity.| 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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