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.


Dieter H. Wilken

Stems erect, solitary to tufted, generally glabrous
Leaves basal and cauline; ligule membranous, acute to toothed at tip; blade flat to rolled, generally ridged
Inflorescence panicle-like; branches spike-like, minutely scabrous
Spikelet: glumes subequal, > floret, membranous, lower 1-veined, upper 1–3-veined; floret 1, bisexual, breaking above glumes; lemma rounded on back, membranous, short bristly at base, minutely scabrous and awned near tip, obscurely 3–5-veined, awn straight, flexible; palea ± = lemma
Species in genus: ± 3 species: temp Eur, Asia. Cult for revegetation
Etymology: (Greek: not maimed, alluding to occasional presence of vestigial florets)


A. spica-venti (L.) P. Beauv.

Stems generally < 4, 2–12 dm, sometimes tufted
Leaf: ligule 3–9 mm; blade 3–5 mm wide, ± glabrous to minutely scabrous above
Inflorescence 8–25 cm; branches spreading; glumes 1.5–3 mm; lemma 1.5–2.5 mm, minutely scabrous at tip, awn 4–9 mm
Chromosomes: 2n=14
Ecology: Disturbed and open sites
Elevation: 90–430 m.
Bioregional distribution: n San Joaquin Valley (near La Grange, e Stanislaus Co.), s Outer South Coast Ranges (Cuyama Valley, Santa Barbara Co.)
Distribution outside California: reported elsewhere in w US; native to temperate Europe

previous taxon | next taxon
bioregional map for APERA%20spica-venti 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 Apera spica-venti
Retrieve dichotomous key for Apera
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