This page is based on the 1993 Jepson Manual.
Please see the Jepson eFlora for up-to-date information about California vascular plants.
|Jepson Flora Project: Jepson Interchange|
|TREATMENT FROM THE JEPSON MANUAL||
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Jepson Interchange (more information)
©Copyright 1993 by the Regents of the University of California
Print edition is available from the University of California Press
|The second edition of The Jepson Manual (2012) is available from the University of California Press|
|See also the Jepson eFlora, which parallels the Second Edition|
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) 1many; 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: 650900 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).
[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, cespitose, rhizomed
Stem ascending to erect, solid; nodes generally hairy
Leaf: ligule membranous, ciliate-fringed; blade firm, flat to inrolled, sharply acute
Inflorescence spike-like, generally cylindric; spikelets in clusters ± equal, 3 per node; clusters wedge-shaped, overlapping, appressed to ascending, hairy-tufted at base, falling as 1 unit; axis wavy; glumes of cluster together involucre-like
Central spikelet subsessile, appressed to or nearest inflorescence axis; glumes equal, < floret, oblanceolate, keeled, ciliate, tip deeply 2-lobed, lobes lanceolate, awns 39, 1 from ± mid-keel, others terminal; florets generally 12, lower floret bisexual, upper floret (if present) bisexual or staminate; lemma lanceolate, 3-veined, generally ciliate, tip generally 2-lobed, generally 1-awned ± from sinus; palea ± = lemma
Lateral spikelets sessile; glumes < to ± = florets, ciliate, lower glume asymmetric with 1 awn from ± middle near margin, generally 2-lobed, lobes unequal; florets 14, generally staminate; lemma 3-veined, tip generally ciliate; palea ± = lemma
Species in genus: 3 species: w US, n Mex
Etymology: (Greek: side needle, from awn position on lower glume of lateral spikelets)
Reference: [Reeder & Reeder 1988 Madroño 35:69]
Plant 3.510 dm, branched above base, generally bush-like
Stem 1.53.5 mm diam at base; internodes sparsely to densely curly-hairy; node hairs curly
Leaves generally cauline, generally sparsely to densely curly-hairy, especially near and sometimes overlapping ligule; ligule membrane < 1 mm, appendages 0; blade < 10 cm, 24 mm wide
Inflorescence 410 cm; spikelet clusters 711 mm
Central spikelet: glume margin hairs 0.53 mm; lower lemma tip sometimes 4-lobed, awns 3 ± from sinuses, central awn 25.5 mm
Lateral spikelets: lower glume with 1+ subsidiary lobes, or larger lobe tip fringed, awns 24; upper glume tip with 2+ lobes or fringed, awns 13, 0.42.5 mm, margin hairs 0.52 mm; lemma tip 2-lobed, awn 1 ± from sinus, 0.42 mm, margin hairs 0.21 mm
Ecology: Common. Dry, open, sandy to rocky slopes, flats, and washes, sand dunes, scrub, woodland
Elevation: < 1600 m.
Bioregional distribution: Peninsular Ranges, e&s Mojave Desert, Sonoran Desert
Distribution outside California: to Utah, n Mexico
Flowering time: FebJun
Synonyms: Hilaria r. (Thurber) Scribner
Important forage; some plants from e DMoj and Ord Mtn (San Bernardino Co.), with ± straight internode hairs, intermediate to P. jamesii
Horticultural information: SUN, DRN: 2, 3, 7, 8, 9, 10, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24 &IRR: 11, 12, 13; also STBL.
|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).|