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


M. californica Scribn.


Rhizomes short or 0; corms generally 0
Stem 5–13 dm; base generally swollen; lowest 1–2 internodes short; nodes ± swollen
Inflorescence 4–30 cm, narrow
Spikelet 5–15 mm; glumes subequal, 3.5–13 mm; fertile florets 2–5, sterile cluster 1–3 mm, truncate; lemma 5–9 mm, tip obtuse or notched
Chromosomes: n=9
Ecology: Open hillsides, oak woodland, coniferous forest
Elevation: < 2100 m.
Bioregional distribution: Northwestern California, Sierra Nevada Foothills, Tehachapi Mountain Area, Central Western California, Western Transverse Ranges.Plants with glumes < spikelet, glume tips obtuse are var. californica ; plants with glumes ± = spikelet, glume tips acute have been called var. nevadensis Boyle
Horticultural information: DRN: 2, 3, 7, 8, 9, 14, 18, 19, 20, 21, 22, 23 &SUN: 5, 15, 16, 17, 24; also STBL.


M. geyeri Bol.

Rhizomes short to long; corms sessile
Stem 8–20 dm
Leaf: ligule 2–3.5 mm; blade 2–8 mm wide
Inflorescence 11–17 cm, wide; branches spreading to reflexed
Spikelet 8–24 mm; lower glume 3.5–7 mm, upper 5.5–11 mm, tips extending to ± 3/4 length of lowest lemma; fertile florets 2–6, sterile cluster 3–7 mm, tapered; lemma 8–11 mm
Chromosomes: n=9
Ecology: Dry open sides, oak woodland, coniferous forest
Elevation: < 2000 m.
Bioregional distribution: Northwestern California, Cascade Range, n&c Sierra Nevada, n Outer South Coast Ranges
Distribution outside California: Oregon
Plants from SnFrB (Marin Co.) with lemma awns 0.5–2 mm have been called var. aristulata J.T. Howell
Horticultural information: DRN: 4, 5, 6, 17 &SHD, IRR: 7, 14, 15, 16, 19, 20, 21, 22, 23, 24.

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