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

    THIS PAGE IS NO LONGER UPDATED
    AND IS MAINTAINED FOR ARCHIVAL PURPOSES ONLY
  • Up-to-date information about California vascular plants is available from the Jepson eFlora.

POACEAE

GRASS FAMILY

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.

PSEUDOROEGNERIA

Mary E. Barkworth

Perennial, cespitose or from rhizomes
Stem erect
Leaves basal and cauline; ligule membranous; uppermost blade generally widely spreading
Inflorescence spike-like; spikelets ± 2-ranked, 1 per node, each spikelet partly overlapping spikelet on opposite side of axis, not overlapping spikelets on same side but not adjacent
Spikelet: glumes < or = lower floret, lanceolate, stiffly membranous, acute to obtuse, awn 0; axis breaking above glumes and between florets; lemma awn terminal, strongly spreading or 0; anthers 4–8 mm
Species in genus: 19 species: arid temp Eurasia, North America
Etymology: (Greek: false roegneria, earlier name for Elymus )
Reference: [Carlson 1986 MS Thesis, OR State Univ]
Segregated from Agropyron.

Native

P. spicata (Pursh) Á. Löve subsp. spicata


Stem 6–10 dm, slender, green or glaucous
Leaf: blade 1–4 mm wide, flat to loosely rolled
Inflorescence 8–16 cm, narrow; middle internodes 0.8–2.5 cm
Spikelet: glumes 6–13 mm, 0.9–2.2 mm wide, ± 1/2 spikelet length, veins evenly glabrous or scabrous; florets 6–8; lemmas 9–14 mm, awned or not
Ecology: Sagebrush steppe, open woodland
Elevation: 800–1650 m.
Bioregional distribution: North Coast Ranges, Cascade Range, n&c Sierra Nevada, Modoc Plateau
Distribution outside California: to s Canada, Colorado
Synonyms: Agropyron s. (Pursh) Scribner & J.G. Sm
Other subsp. in nw US
Horticultural information: DRN, SUN: 1, 2, 3, 6, 7, 14, 15, 16, 17 &IRR: 8, 9, 10, 19, 20, 21, 22, 23, 24.

previous taxon | next taxon
bioregional map for PSEUDOROEGNERIA%20spicata%20subsp.%20spicata being generated
 


Retrieve Jepson Interchange Index to Plant Names entry for Pseudoroegneria spicata subsp. spicata
Retrieve dichotomous key for Pseudoroegneria
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
Glossary


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