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
For up-to-date information about California vascular plants, visit the Jepson eFlora.



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

Annual, perennial herb
Stems generally erect
Leaves basal and cauline; sheaths generally keeled, < internodes; ligule membranous, minutely ciliate; blade flat or folded
Inflorescence raceme-like, several often clustered together; branches 2–3, spike-like; axes breaking apart with age
Spikelets paired; pair with subtending axis segment falling as 1 unit; lower spikelet sessile, bisexual; upper spikelet stalked, staminate
Sessile spikelet: glumes > florets, lanceolate, leathery; florets 2, lower vestigial, obscure, upper fertile, hyaline, awned at 2-toothed tip
Species in genus: ± 60 species: warm temp, tropical
Etymology: (Greek: split chaff, from toothed lemma)


S. scoparium (Michx.) Nash


Stem 5–15 dm, branched
Leaf glabrous to sparsely hairy; ligule 0.5–2.5 mm; blade generally 6–25 cm, 1.5–5 mm wide, green to glaucous
Inflorescence spike-like; branches 2–3, 2–6 cm, axes zigzag with age; stalks flat, ciliate on upper 2/3, spreading with age
Sessile spikelet: glumes 6–9 mm, lower enclosing upper; lemma 4–6.5 m, awn 8–16 mm, bent, twisted
Chromosomes: 2n=40
Ecology: Disturbed sites, roadsides
Elevation: < 150 m.
Bioregional distribution: Sacramento Valley (Solano Co.)
Distribution outside California: s Canada, c&e US, n Mexico
Cult for forage, soil stabilization. Plants with straight inflorescence axis, spikelet stalks ciliate at tip are S. cirratum (Hack.) Wooton & Standley, reported once from s San Diego Co.

previous taxon | next taxon
bioregional map for SCHIZACHYRIUM%20scoparium 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 Schizachyrium scoparium
Retrieve dichotomous key for Schizachyrium
Overlay Consortium of California Herbaria specimen data by county on this map
Show other taxa with the same California distribution | Read about bioregions | Get lists of plants in a bioregion
Return to the Jepson Interchange main page
Return to treatment index page
  • This page is no longer being maintained.

University & Jepson Herbaria Home Page |
General Information | University Herbarium | Jepson Herbarium |
Visiting the Herbaria | On-line Resources | Research |
Education | Related Sites
Copyright © by the Regents of the University of California