Distribution Map

Vegetative Morphology
Plants	perennial; cespitose.
Culms	(5)10-60 cm, rooting at the nodes.
Ligules	2-5 mm, obtuse.
Blades	2-12 cm long, 1-4(7) mm wide.
Upper sheaths	somewhat inflated.
Reproductive Morphology
Panicles	1.5-7 cm long, 4-8 mm wide.
Glumes	1.9-3.5 mm, connate at the base, pubescent, keels not winged, ciliate.
Lemmas	2.5-3 mm, connate in the lower 1/2, glabrous or with a few scattered hairs at the tips.
Awns	3-5(6) mm, geniculate, exceeding the lemmas by (1.2)2-4 mm.
Anthers	(0.9)1.4-2.2 mm.
Caryopses	1-1.5 mm.

Chromosome Number(s)

2n = 28

Nativity / Range

Native to Eurasia and parts of North America; naturalized in eastern North America.

Typical Habitat(s)

Shallow water, ditches, open wet meadows, shores, and stream banks from the lowland to montane zones.

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Additional Notes

Alopecurus x haussknechtianus Asch. & Graebn. is a hybrid between A. geniculatus and A. aequalis, frequently occurring in drier midcontinental areas in Alberta to Saskatchewan, south to Arizona and New Mexico.

Name/Synonymy Publication Info

Alopecurus geniculatus L., Sp. pl. 1:60 (1753). Tozzettia geniculata (L.) Bubani, Fl. pyren. 4:275 (1901-1902) [title page 1901]. LEC: UPS (Burser Herb. I:26); Europe [Cope in Cafferty, E.C. Jarvis & Turland, Taxon 49:245 (2000)].

Alopecurus pallescens Piper in Piper & Beattie, Fl. Palouse reg. 18 (1901). HOL: US 75460!; U.S.A., Washington: Pullman, in wet ground, edges of ponds; 20 Jun 1893; C.V. Piper 1743.

Treatment From

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

Vegetative Morphology