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, cespitose, generally with rhizomes
Stems tall, erect, solid in X -section
Leaves cauline; sheaths > internodes; ligule membranous, truncate; blade flat
Inflorescence panicle-like; branches ± spike-like, silky-hairy
Spikelets paired, unequally stalked, breaking below glumes, falling as 1 unit; stalks long-hairy at tip; glumes ± equal, > florets, membranous; florets 2, lower vestigial, obscure, upper bisexual; lemma translucent, tip awned; stamens 2–3
Species in genus: ± 20 species: tropical Asia
Etymology: (Greek: stalked flower, from spikelets)
Cult.
| Introduced |
Stems densely clumped, < 3 m
Leaf: blade 4–10 dm, 6–10 cm wide, margin serrate to smooth
Inflorescence 1–3 dm, fan-shaped
Spikelets 3–4 mm; lower spikelet stalk 1–2 mm, upper spikelet stalk 3–6 mm, hairs > spikelet; lower glume leathery, upper papery; awn 8–12 mm
Ecology: Irrigation ditches
Elevation: < 200 m.
Bioregional distribution: n Sierra Nevada Foothills (El Dorado Co.)
Distribution outside California: native to se Asia
| 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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