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.


A. brachychaetum (Godr.) Barkworth

Stem 4–10 dm
Leaf: sheath glabrous; blade 1–2 mm wide
Inflorescence 20–30 cm
Spikelet: glumes 6–8 mm, ± equal; floret 4.5–5.5 mm; callus blunt; lemma tip hairs 0.8–1.7 mm, > body hairs, awn 15–20 mm, bent twice
Ecology: Disturbed sites
Elevation: < 300 m.
Bioregional distribution: nw San Joaquin Valley (eradicated from San Joaquin Valley in Fresno Co.), n South Coast
Distribution outside California: native to Argentina
Synonyms: Stipa b. Godr


A. capillaris L.


Perennial 10–75 cm; stolons or rhizomes < 5 cm, slender
Leaves: ligule 0.5–2 mm, generally wider than long; lower blades 3–10 cm, 1–5 mm wide, generally flat
Inflorescence 3–20 cm, widely ovate in outline, open; 1° branches mostly spreading, lower 1.5–4 cm, axes thread-like
Spikelet: glumes 2–3 mm; callus glabrous or minutely hairy; lemma 1.5–2.5 mm, sometimes short-awned near tip; palea 1/2–2/3 X lemma; anthers 0.8–1.3 mm
Chromosomes: 2n=28
Ecology: Roadsides, open, disturbed places
Elevation: < 1000 m.
Bioregional distribution: Klamath Ranges, Cascade Range, n&c Sierra Nevada, Central Coast, San Francisco Bay Area, South Coast
Distribution outside California: to Alaska, e US; native to Europe
Synonyms: A. tenuis Sibth


A. thurberiana Hitchc.

Perennial 8–50 cm, sometimes from rhizomes < 3 cm
Leaves: basal withering in flower; ligule 0.8–3 mm; lower blades 8–15 cm, 1–3 mm wide, flat
Inflorescence 4–11 cm, oblong in outline, ± open; 1° branches ascending to erect, generally 1–2 cm
Spikelet: glumes 1.5–2.5 mm; axis generally prolonged beyond floret, 0.5 mm, short-hairy-tufted; callus hairs minute, sparse; lemma 1–2 mm, awn 0; palea ± 1.5 mm; anthers 0.6–0.8 mm
Chromosomes: 2n=14
Ecology: Moist, often heavy soils, coniferous forest
Elevation: 1300–3500 m.
Bioregional distribution: Klamath Ranges, High North Coast Ranges, High Cascade Range, High Sierra Nevada
Distribution outside California: to Alaska, Montana, Colorado
Intergrades with A. humilus
Horticultural information: TRY.

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