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.

Native

P. bigelovii Vasey & Scribn.

Annual, cespitose, generally 1.5–4 dm
Leaf: sheath open 1/2–3/4 length; ligule 1.5–6 mm, truncate to obtuse, minutely scabrous; blade 1.5–5 mm wide, soft, generally flat, abruptly prow-tipped
Inflorescence 5–15 cm, ± linear; branches appressed, with spikelets from near base
Spikelet: callus cobwebby; lemma 2.5–4 mm, veins (sometimes between) hairy; palea keels hairy
Flower: anthers 0.2–1 mm
Chromosomes: 2n=28
Ecology: Uncommon. Shady places in desert scrub, yellow-pine forests
Elevation: < 1500 m.
Bioregional distribution: Southwestern California, Desert
Distribution outside California: to Texas, nw Mexico
Flowering time: Early spring.

Native

P. kelloggii Vasey

Perennial from long rhizomes, 2.5–8.5 dm
Leaf: sheath open to near base; ligule 1–4 mm, finely scabrous, truncate to obtuse; blade 2–5 mm wide, soft, generally flat
Inflorescence 10–20 cm, ovate to triangular, open, sparse; branches ascending in flower, ± drooping in fruit, scabrous, with spikelets only in tip 1/3
Spikelet: callus cobwebby; lemma 4–5 mm, glabrous
Flower: anthers ± 2 mm
Chromosomes: 2n=56
Ecology: Shady openings in mixed-conifer and redwood forests
Elevation: < 500 m.
Bioregional distribution: North Coast, n Central Coast
Distribution outside California: ?sw Oregon
Fls spring
Horticultural information: TRY.

 

Sorry, not found as entry in The Jepson Manual