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

G. grandis S. Watson

AMERICAN MANNAGRASS


Stem 9–20 dm, 3–6 mm diam
Leaf: ligule 2–7 mm; blade 4–15 mm wide, moderately thick
Inflorescence 16–40 cm; branches spreading
Spikelet 4–6.5 mm, ovoid; lower glume 1–1.8 mm, upper 1.5–2.5 mm; florets 4–7; lemma 2–2.8 mm, widest at middle or below; palea tip irregular or widely V-notched
Chromosomes: n=10
Ecology: Wet places, meadows, lake and stream margins
Elevation: < 500 m.
Bioregional distribution: North Coast, North Coast Ranges
Distribution outside California: to British Columbia, eastern US

HESPEROSTIPA

Mary E. Barkworth

Perennial, cespitose
Stem erect, unbranched
Leaf: blade upper surface conspicuously ridged, generally inrolled
Inflorescence panicle-like, narrow
Spikelet: glumes tapered from near base to acute tip, awn 0; axis breaking above glumes; floret 1, 7–25 mm, narrowly cylindric; callus 2–5 mm, sharp, densely stiff-hairy; lemma hard, margins overlapping at maturity, upper portion fused, awn 6.5–18 cm, bent twice, lower segments twisted, last segment not twisted; palea = lemma, hard, 2-veined, veins terminating at tip
Species in genus: 4 species: North America
Etymology: (Greek: western stipa)
Segregated from Stipa ; most closely related to Piptochaetium, Nassella.

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