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|
|TREATMENT FROM THE JEPSON MANUAL||
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Jepson Interchange (more information)
©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) 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).
[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, perennial herb, cespitose or with rhizomes
Stem erect; internodes generally solid
Leaves cauline; sheaths generally < internodes; ligule membranous; blades flat or folded
Inflorescence panicle-like, open to compact
Spikelets in pairs (trios at branch tips); lower sessile, bisexual; upper 1(2) stalked, staminate; pair with subtending axis segment falling as 1 unit
Sessile spikelet ovoid; lower glume leathery, shiny, glabrous to puberulent, enclosing upper glume, florets; florets 2, lower sterile, upper fertile; lemma membranous, fertile lemma awned, awn bent, twisted; palea < lemma
Species in genus: ± 20 species: tropical, subtropical, Africa. Cult for food, forage, sugar
Etymology: (Italian: Sorgho)
Reference: [de Wet 1978 Amer J Bot 65:477484]
Perennial with rhizomes
Stem erect, 0.52 m
Leaf: blade 0.52 cm wide
Inflorescence 15 dm, 525 cm wide, generally open; lower branches spreading to ascending
Sessile spikelet 46.5 mm; lemma 45 mm, awn 910 mm or 0
Ecology: Disturbed areas, ditchbanks, roadsides
Elevation: < 800 m.
Bioregional distribution: Northwestern California, Cascade Range Foothills, Sierra Nevada Foothills, Great Central Valley, Central Western California, Southwestern California, Sonoran Desert
Distribution outside California: native to Mediterranean
Flowering time: MayAug
|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).|