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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POACEAE

GRASS FAMILY

James P. Smith, Jr., except as specified

Annual to bamboo-like; roots generally fibrous
Stem generally round, hollow; nodes swollen, solid
Leaves alternate, 2-ranked, generally linear; sheath generally open; ligule membranous or hairy, at blade base
Inflorescence various (of generally many spikelets)
Spikelet: glumes generally 2; florets (lemma, palea, flower) 1–many; lemma generally membranous, sometimes glume-like; palea generally ± transparent, ± enclosed by lemma
Flower generally bisexual, minute; stamens generally 3; stigmas generally 2, generally plumose
Fruit: achene-like grain
Genera in family: 650–900 genera; ± 10,000 species: worldwide; greatest economic importance of any family (wheat, rice, maize, millet, sorghum, sugar cane, forage crops, ornamental, weeds; thatching, weaving, building materials)
Reference: [Hitchcock 1951 Manual grasses US, USDA Misc Publ 200; Clayton & Renvoise 1986 Kew Bull Add Series 13]
See Glossary p. 26 for illustrations of general family characteristics. Generally wind-pollinated.

ALOPECURUS

FOXTAIL

William J. Crins

Annual, perennial herb, cespitose or from stolons
Stem decumbent to erect, 1–8 dm; nodes visible, brown
Leaves: ligule 1–6 mm, membranous, truncate to acute, generally scabrous; blade flat, glabrous or scabrous
Inflorescence panicle-like, generally cylindric, dense; branches short
Spikelet ± compressed, breaking below glumes, falling as 1 unit; glumes ± equal, generally = spikelet, membranous, generally keeled, keel and lateral veins generally stiff- or appressed-hairy, margins free or fused near base, tip obtuse, acute, or short-awned, 3-veined; floret 1; lemma membranous, margins keeled, sometimes fused near base, truncate to acute, 3–5-veined, awned on back below middle, awn straight or abruptly bent generally at lemma tip; palea generally 0; anthers 0.5–4 mm
Fruit glabrous
Species in genus: ± 35 species: temp North America, Eurasia
Etymology: (Greek: fox tail)
Reference: [Rubtzoff 1961 Leafl West Bot 9:165–180]

Native

A. aequalis Sobol.

SHORT-AWN FOXTAIL

Perennial
Stem 0.9–4.7 dm
Leaf: ligule 2–5.5 mm; blade 2.5–10 cm, 1–5(8) mm wide
Inflorescence 1–7.5 cm, 3–6(9) mm wide
Spikelet: glumes 2–3(3.5) mm; lemma awn straight, exceeding lemma body by 0–2 mm; anthers 0.5–1 mm
Chromosomes: 2n=14
Ecology: Common. Wet meadows, shores
Elevation: 100–3500 m.
Bioregional distribution: California Floristic Province, Great Basin Floristic Province
Distribution outside California: to subarctic, e N.America, Eurasia
Flowering time: May–Jul
Plants in CCo with spikelet < 3.4 mm, lemma awn exceeding lemma body by 0–2 mm, have been called var. sonomensis P. Rubtzov, Sonoma alopecurus; plants from high elevations in SNH also may have long awns.

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bioregional map for ALOPECURUS%20aequalis being generated
 
YOU CAN HELP US make sure that our distributional information is correct and current. If you know that a plant occurs in a wild, reproducing state in a Jepson bioregion NOT highlighted on the map, please contact us with that information. Please realize that we cannot incorporate range extensions without access to a voucher specimen, which should (ultimately) be deposited in an herbarium. You can send the pressed, dried collection (with complete locality information indicated) to us (e-mail us for details) or refer us to an accessioned herbarium specimen. Non-occurrence of a plant in an indicated area is difficult to document, but we will especially value your input on those types of possible errors (see automatic conversion of distribution data to maps).

Retrieve Jepson Interchange Index to Plant Names entry for Alopecurus aequalis
Retrieve dichotomous key for Alopecurus
Overlay Consortium of California Herbaria specimen data by county on this map
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