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

  • Up-to-date information about California vascular plants is available from 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.


Perennial, tufted or mat-like, sometimes from short stolons
Stems spreading to erect
Leaves generally basal; ligule short-hairy; blade ± stiff, pointed
Inflorescence raceme- or panicle-like, head-like, ± dense
Spikelet compressed; glumes ± equal, membranous, generally acuminate, glabrous, 1-veined; axis breaking apart above glumes and between florets; florets 4–20, lower bisexual, upper staminate or sterile; lemma wide, back rounded, generally densely soft-hairy below middle, 3-veined, tip 2-lobed or not, short-awned from tip or not; palea densely hairy below middle; stamens 1 or 3
Species in genus: 5 species: sw US, Mex, South America
Etymology: (Greek: woolly nerve, from lemma, palea hairs)
Reference: [Tateoka 1961 Amer J Bot 48:565–573]


E. pulchellum (Kunth) Tateoka


Perennial, mat-like, with clusters of leaves from short stolon-like stems
Stems spreading to erect, < 1 dm
Leaf: sheath margin short-soft-hairy at collar; blade 2–6 cm, inrolled
Inflorescence ± panicle-like, 1–2.5 cm, 1–1.5 cm wide, short-stalked to subsessile and generally < terminal leaves
Spikelet 6–9 mm; glumes 6–9 mm, tan or purplish, short-awned; lemma 2.5–5 mm, 2-lobed from near middle, awn 2.5–4 mm
Chromosomes: 2n=16
Ecology: Sandy to rocky slopes, flats, desert scrub, woodland
Elevation: 300–1700 m.
Bioregional distribution: Desert
Distribution outside California: to Colorado, Texas, c Mexico
Flowering time: Feb–May
Synonyms: Tridens p. (Kunth) Hitchc

previous taxon | next taxon
bioregional map for ERIONEURON%20pulchellum being generated

Retrieve Jepson Interchange Index to Plant Names entry for Erioneuron pulchellum
Retrieve dichotomous key for Erioneuron
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

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