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

Perennial, generally cespitose
Stems ascending to erect
Leaves basal and cauline; ligule hairy; blade flat to inrolled
Inflorescence panicle- to spike-like, narrow, generally compact
Spikelet: glumes ± subequal, 3–9-veined; florets 3–6, breaking above glumes and weakly between florets, lower 1–3 florets fertile, bisexual, upper generally sterile, gradually reduced; lemmas < glumes, elliptic to ovate, firmly membranous, rounded on back, generally 9-veined, awned at truncate tip, awns 9, plumose; fertile palea slightly > lemma
Species in genus: ± 30 species: warm temp North America, Africa, Asia, Australia
Etymology: (Greek: nine beards, from 9 plumose awns)
Reference: [Renvoise 1968 Kew Bull 22: 393–401]


E. desvauxii P. Beauv.


Stem 1–4 dm; nodes dense, short-hairy; internodes 2–5 cm
Leaf soft-hairy; sheath ciliate; ligule hairs < 1 mm; blade > 2 X internode, < 2 mm wide, ± inrolled
Inflorescence spike-like, 3–6 cm, grayish
Spikelet: glumes minutely soft-hairy on back, strongly veined, lower 3–5 mm, upper 4–6 mm; florets 3, lower 1 fertile, upper 2 sterile; lemmas 1–3 mm, awns 2–5 mm, exserted
Chromosomes: 2n=20
Ecology: Rocky slopes, crevices, calcareous soils, desert woodland
Elevation: 1275–1825 m.
Bioregional distribution: e Mojave Desert (Desert Mountains)
Distribution outside California: to Colorado, w Texas, n Mexico, S.America
Flowering time: Aug–Sep
Lower sheaths sometimes enclose cleistogamous spikelets that disperse with stem parts.
See the CNPS Inventory for information about endangerment and rarity.
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bioregional map for ENNEAPOGON%20desvauxii 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 Enneapogon desvauxii
Retrieve dichotomous key for Enneapogon
Overlay Consortium of California Herbaria specimen data by county on this map
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