Jepson Flora Project: Jepson Interchange    

 
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Jepson Interchange (more information)
©Copyright 1993 by the Regents of the University of California

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  • Up-to-date information about California vascular plants is available from the Jepson eFlora.

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

subsp. brachyantherum


Stem generally robust
Leaf: blade < 19 cm, < 9 mm wide, glabrous or sparsely short-hairy
Central spikelet: glumes 7–17 mm, generally straight with age; lemma awn < 4.5 mm; anthers 1–3.5 mm
Chromosomes: 2n=28,42
Ecology: Habitat and range of sp
Elevation:
Bioregional distribution: California (except Desert)
Flowering time: May–Aug

Introduced

H. marinum Huds. subsp. gussoneanum (Parl.) Thell.

MEDITERRANEAN BARLEY

Annual
Stem 1–5 dm, bent at base or erect; nodes glabrous
Leaf: basal sheaths ± hairy, appendages < 2 mm or 0; blade 1–6 mm wide
Inflorescence 1.5–7 cm, 5–20 mm wide, green to purple, breaking apart at nodes in fruit; central and lateral spikelets falling together
Central spikelet: glumes 14–26 mm, not flat at base, ± straight with age; floret 5–8 mm; lemma awn 6–18 mm
Lateral spikelets sterile; glumes 10–24 mm, rounded to slightly flat; floret < 5 mm; lemma awn 3–8 mm
Ecology: Dry to moist, disturbed sites
Elevation: < 1500 m.
Bioregional distribution: California (except mtns)
Distribution outside California: to British Columbia, Idaho, Arizona; native to Europe
Flowering time: Apr–Jun
Synonyms: H. hystrix Roth; H. geniculatum All

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