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Key to families | Table of families and genera

Specimen numbers are hyperlinked to records in the Consortium of California Herbaria data view where possible. Taxa are hyperlinked to entries in the Jepson Interchange via the "[Online Interchange]" link.

 

DESCHAMPSIA HAIR GRASS

Robert E. Preston & Dieter H. Wilken


Annual, perennial herb. Stem: erect, 1 to densely clumped. Leaf: generally basal, tufted; ligule narrow, decurrent to sheath, glabrous to minutely hairy; blade flat to inrolled. Inflorescence: panicle- to spike-like, open to narrow. Spikelet: glumes, lemmas shiny; glumes ± equal, > lower floret; axis prolonged >= 0.75 mm beyond upper floret, conspicuously bristly (sometimes with vestigial floret at tip); florets 1–3, bisexual, breaking above glumes and between florets; callus soft-hairy; lemma rounded, 2–4-toothed at truncate tip, faintly 3–7-veined, awned at or below middle, awn straight to bent; palea ± = lemma.
30–40 species: temperate America, Eurasia, New Zealand, Antarctica. (Louis Auguste Deschamps, French naturalist, 1765–1842) Deschampsia atropurpurea is now treated as Vahlodea atropurpurea.
Unabridged references: [Chiapella 2007 Taxon 56:55–64; Kawano 1963 Canad J Bot 41:719–742]

Key to Deschampsia

1. Annual; stems 1 or loosely clumped; basal leaves not tufted ..... D. danthonioides

1' Perennial herb; stems loosely to densely clumped; basal leaves tufted

2. Inflorescence < 1 cm wide; basal leaf blades ± 1 mm wide ..... D. elongata

2' Inflorescence > 1 cm wide; basal leaf blades 1–4 mm wide ..... D. cespitosa

3. Inflorescence compact, lower branches ascending to erect ..... subsp. holciformis

3' Inflorescence open, lower branches spreading to drooping

4. Plants generally glaucous; glumes 4.4–7.5 mm; awns generally exceeding lemmas ..... subsp. beringensis

4' Plants not glaucous; glumes 2–6 mm; awns generally exceeded by or exceeding lemmas ..... subsp. cespitosa

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Citation for the whole project: Jepson Flora Project (eds.) [year] Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html [accessed on month, day, year]
Citation for an individual treatment: [Author of taxon treatment] [year]. [Taxon name] in Jepson Flora Project (eds.) Jepson eFlora, [URL for treatment]. Accessed on [month, day, year].
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