Jepson Flora Project: Jepson Interchange    

 
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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.

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.

DESCHAMPSIA

HAIRGRASS

Dieter H. Wilken and Elizabeth Painter

Annual, perennial herb
Stems erect, solitary to densely clumped
Leaves basal to cauline; ligule narrow, decurrent to sheath, glabrous to minutely hairy; blades flat to inrolled
Inflorescence panicle- to spike-like, open to narrow
Spikelet: glumes and lemmas shiny; glumes equal to ± subequal, > lower floret; axis prolonged beyond upper floret, bristly (sometimes with vestigial floret at tip); florets 1–3, bisexual, breaking above glumes and between florets; callus soft-hairy; lemmas rounded, 2–4-toothed at truncate tip, faintly 3–7-veined, awned at or below middle, awn straight to bent; palea ± = lemma
Species in genus: 30–40 species: temp Am, Eurasia, New Zealand, Antarctica
Etymology: (J. L-Deslongchamps, France, born 1774)

Native

D. cespitosa (L.) P. Beauv.

TUFTED HAIRGRASS

Perennial
Stems densely clumped, 2–10 dm
Leaves generally basal, tufted, glabrous to scabrous; ligule 3–8 mm, acute to obtuse, entire to toothed at tip; blades generally 8–20 cm, 1–4 mm wide, flat to inrolled
Inflorescence narrow to open; lower branches erect to drooping
Spikelet: glumes and tips of lemmas purplish; glumes 3–7 mm, ± subequal, lanceolate, acute, lower 1-veined, upper 3-veined; florets generally 2; callus hairs generally < 1/3 lemma length; lemmas 2–4 mm, generally 4-toothed at tip, faintly 5-veined, awned below middle, awn 2–6 mm, straight to slightly bent
Chromosomes: 2n=26–28
Ecology: Wet sites, meadows, streambanks, coastal marshes, forests, alpine
Elevation: < 3900 m.
Bioregional distribution: Northwestern California, Cascade Range, Sierra Nevada, Central Coast, San Francisco Bay Area, Transverse Ranges, Warner Mountains, n East of Sierra Nevada, White and Inyo Mountains
Distribution outside California: to Alaska, e N.America, S.America, Eurasia, New Zealand
Sspp. intergrade.

Native

subsp. cespitosa


Inflorescence open; lower branches spreading to drooping
Spikelets solitary to clustered on exposed branchlets
Ecology: Meadows, streambanks, coastal marsh, forests, alpine
Elevation: < 3820 m.
Bioregional distribution: Northwestern California, Cascade Range, Sierra Nevada, Central Coast, San Francisco Bay Area, Transverse Ranges, Warner Mountains, n East of Sierra Nevada, White and Inyo Mountains
Distribution outside California: to Alaska, Canada, e US, Eurasia
Flowering time: Jul–Aug
Variable in plant and spikelet size, awn length. Plants of NCo with glumes > 5 mm have been called subsp. beringensis (Hultén) W.E. Lawr
Horticultural information: SUN or part SHD: 4, 5, 6, 17 &IRR: 1, 2, 3, 7, 8, 9, 10, 14, 15, 16, 18, 19, 20, 21, 22, 23, 24; also STBL.

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bioregional map for DESCHAMPSIA%20cespitosa%20subsp.%20cespitosa 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 Deschampsia cespitosa subsp. cespitosa
Retrieve dichotomous key for Deschampsia
Overlay Consortium of California Herbaria specimen data by county on this map
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