Jepson Flora Project: Jepson Interchange    

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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.


Jerrold I Davis

Perennial from rhizomes
Stems decumbent to erect, sometimes rooting at nodes
Leaves basal and cauline; sheath open ± to base; ligule thinly membranous, acute to obtuse, sometimes toothed
Inflorescence panicle-like; lower branches reflexed to erect
Spikelet bisexual; glumes < lowest floret, lower glume generally 1-veined, upper generally 3-veined; florets 3–8; lemma firm, back rounded, scabrous, margin near tip scabrous-serrate at 10X , prominently (5)7–9-veined, veins not converging at tip; awn 0; palea ± = lemma
Species in genus: ± 5 species: temp North America, e Asia
Etymology: (J. Torrey, Amer botanist, 1796–1873)
Reference: [Davis 1991 Phytologia 70:361–365]
Spp. generally occurring in freshwater wet habitats.


T. pallida (J. Presl) G.L. Church var. pauciflora (J. Presl) J.I. Davis


Stem 2–14 dm
Leaf: cauline leaf blade 3.5–17.5 mm wide
Inflorescence (3)5–25 cm, 1–12 cm wide, deltate to ovate, elliptic or oblanceolate in outline, 1–6 X width; lower branches weakly reflexed to spreading or erect
Spikelet: florets 3–8; lowest lemma 2–3.5 mm; anthers of lowest floret 0.5–0.7 mm
Chromosomes: 2n=14
Ecology: Wet areas in forests, stream or lake margins
Elevation: < 3500 m.
Bioregional distribution: Northwestern California, Cascade Range, Sierra Nevada, Central Coast, Modoc Plateau
Distribution outside California: to Alaska, Rocky Mtns
Synonyms: Puccinellia pauciflora (J. Presl) Munz
Plants from > 3000 m, with inflorescence ovate, 3–6 cm, length < 5 X width, have been called Puccinellia californica (Beetle) Munz, Sierra Nevada alkali grass
Horticultural information: STBL.

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bioregional map for TORREYOCHLOA%20pallida%20var.%20pauciflora being generated

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