Jepson Flora Project: Jepson Interchange    

 
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Jepson Interchange (more information)
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Introduced

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
Weedy.

Introduced

A. capillaris L.

COLONIAL BENT

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

Native

A. hooveri Swallen

HOOVER'S BENT GRASS

Perennial 30–80 cm
Leaves: lower leaf sheaths finely tomentose; ligule 4–6 mm; lower blades 10–16 cm, 1–2 mm wide, flat, becoming inrolled
Inflorescence (4)10–17 cm, generally lanceolate in outline, open; 1° branches ± ascending, 15–40 cm, axes thread-like
Spikelet: glumes 2–3 mm; callus hairs < 0.3 mm, dense; lemma 1.5–2 mm, awned below middle, awn < 2.5 mm, bent; palea 0; anthers 1–1.5 mm
Ecology: UNCOMMON. Dry sandy soils, open chaparral, oak woodland
Elevation: < 600 m.
Bioregional distribution: s Central Coast, s Outer South Coast Ranges (San Luis Obispo, Santa Barbara cos.).

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