Jepson Flora Project: Jepson Interchange    

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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.



Kelly W. Allred

Perennial, cespitose
Stems erect, branched; nodes generally hairy
Leaves cauline; ligule membranous, minutely ciliate; blade flat or folded
Inflorescence panicle-like with 2 or more spike-like branches, solitary or compactly clustered, partly enclosed in leaf sheaths; axes breaking apart with age; spikelet sessile, subtended by hairy, naked stalk and axis segment, falling with stalk and axis segment as 1 unit
Spikelet: glumes ± = florets, lanceolate, ± translucent; florets 2, lower vestigial, obscure, upper fertile, lemma translucent, awned, palea << lemma or 0; stamens 1–3
Fruit oblong, brownish or purplish
Species in genus: ± 100 species: warm temp, tropical. Some species cultivated for forage, revegetation
Etymology: (Greek: man beard, from hairy staminate spikelets)
Reference: [Campbell 1983 J Arn Arbor 64:171–254]


A. glomeratus (Walter) Britton, Sterns & Poggenb. var. scabriglumis C.S. Campb.


Stem 0.8–1.5 m
Leaf: sheath scabrous; ligule 1–2.2 mm; lower blades 3–6 dm, 3.5–6 mm wide
Inflorescences many, compactly clustered, plume-like; branches generally 2–4
Spikelet 4–4.5 mm; lower glume keel generally scabrous at base; callus hairs 1–2 mm; awn 0.5–2 mm
Chromosomes: 2n=20,40
Ecology: Moist, open, disturbed areas, seeps
Elevation: < 600 m.
Bioregional distribution: Transverse Ranges, Mojave Desert, naturalized in North Coast, Outer North Coast Ranges, n Sierra Nevada Foothills, High Sierra Nevada, Sacramento Valley, South Coast
Distribution outside California: to New Mexico, Baja California
Flowering time: Sep–Mar
Horticultural information: IRR or WET, SUN: 5, 7, 8, 9, 10, 11, 12, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24.

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bioregional map for ANDROPOGON%20glomeratus%20var.%20scabriglumis 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 Andropogon glomeratus var. scabriglumis
Retrieve dichotomous key for Andropogon
Overlay Consortium of California Herbaria specimen data by county on this map
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