Jepson Flora Project: Jepson Interchange    

link to manual TREATMENT FROM THE JEPSON MANUAL (1993) previous taxon | next taxon
Jepson Interchange (more information)
©Copyright 1993 by the Regents of the University of California
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James P. Smith, Jr., except as specified

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)
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.


Robert Webster

Annual, perennial herb
Stems generally erect; internode solid to hollow inside
Leaves basal and cauline; ligule short-hairy or membranous, ciliate
Inflorescence panicle-like, dense, generally cylindric; 1° branches spreading to appressed; spikelets many, generally clustered on one side of short 2° branch, short-stalked to subsessile, subtended by 1–15 bristles, bristles generally scabrous
Spikelet falling as 1 unit, generally elliptic; glumes unequal; florets generally 2, ± equal, lower floret sterile or staminate, palea generally < lemma, upper floret fertile, firm, generally hard, rough, margin inrolled, tip blunt
Species in genus: ± 100 species: warm temp, tropical Eurasia, Africa
Etymology: (Latin: bristly)
Reference: [Rominger 1962 Illinois Biol Monogr 29:1–132]
Some species cultivated for food.


S. pumila (Poir.) Roem. & Schult.

Stem 2–13 dm
Leaf: sheath 4–9 cm, glabrous; ligule ± 0.5–1 mm; blade 5–30 cm, 3–10 mm wide, upper surface glabrous
Inflorescence 2–6 cm; 1° branches 5–10 mm, axis short-hairy; bristles 4–12; spikelet stalk << 0.5 mm
Spikelet 3–3.5 mm, ± 1.5–2 mm wide; lower glume 1–1.5 mm, 3–5-veined, upper glume 0.5–0.7 X spikelet length; lower floret staminate, lemma 5-veined, tip acute, palea = lemma
Ecology: Generally moist sites, fields
Elevation: < 1200 m.
Bioregional distribution: e Klamath Ranges, Cascade Range Foothills, Sierra Nevada Foothills, Great Central Valley, Central Western California, South Coast, East of Sierra Nevada, Mojave Desert
Distribution outside California: to s Canada, e US, Mexico; native to Europe
Flowering time: Jun–Oct
Synonyms: S. lutescens (Weigel) Hubb., S. glauca (L.) P. Beauv

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bioregional map for SETARIA%20pumila being generated
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).

Retrieve Jepson Interchange Index to Plant Names entry for Setaria pumila
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