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Distribution Map

© Utah State University

© Utah State University

© University of Tennessee Herbarium, Knoxville

Vegetative Morphology

 
Plants annual; tufted.
Culms 5-50 cm.
Ligules 2.8-4.5 mm, obtuse.
Blades 3-15 cm long, 0.9-3 mm wide.
Upper sheaths not or only slightly inflated.

Reproductive Morphology

 
Panicles 1-7 cm long, 3-6 mm wide, always dense.
Glumes 2.1-3.1 mm, connate at the base, sparsely pubescent, not inflated below, keels not winged, ciliate.
Lemmas 1.9-2.7 mm, connate in the lower 1/2, glabrous.
Awns 3-6.5 mm, geniculate, exceeding the lemmas by 1.6-4 mm.
Anthers 0.3-1 mm.
Caryopses 1-1.5 mm.

Chromosome Number(s)

2n = 14

Nativity / Range

Native to the central plains, Mississippi valley, and southeastern United States.

Typical Habitat(s)

Wet meadows, ditches, wetland borders, and other moist, open habitats; it is occasionally a weed of rice fields; adventive in gardens and nurseries; occurs in arid areas of the prairies and southwest, growing sporadically along sloughs and in ditches and vernal pools.

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Name/Synonymy Publication Info

Alopecurus carolinianus Walter, Fl. carol. 74 (1788). HOL: BM; U.S.A., South Carolina.

Alopecurus ramosus Poiret in Lam., Encycl. 8:776 (1808); Alopecurus geniculatus var. ramosus (Poiret) H. St. John, Rhodora 19:167 (1917). Alopecurus pedalis Bosc ex P. Beauv., Essai Agrostogr. 4 (1812). Alopecurus gracilis Willd. ex Trin., M?m. Acad. Imp. Sci. Saint-P?tersbourg, Ser. 6, Sci. Math., Seconde Pt. Sci. Nat. 6:38 (1840). HOL: P; U.S.A., "Carolina"; L.A.G. Bosc.

Alopecurus macounii Vasey, Bull. Torrey Bot. Club 15:12 (1888). HOL: US 75465!; Canada, British Columbia: Vancouver Island, Oak Bay, on dry rocks; 30 May 1887; J.M. Macoun 56.

Alopecurus geniculatus var. caespitosus Scribner in Macoun, Cat. Canad. pl. 25:389 (1890). HOL: US 996870; Canada, British Columbia: Yale; 17 May 1889; J.M. Macoun 13.

Treatment From

W.J. Crins. Alopecurus in Flora of North America, volume 24. In prep. Oxford University Press.

Fact Sheet Developed By

Pedro Oñativia Lake © 2006