Plant. Photographer N Sloth, Arhus, Denmark

Flower head, unknown photographer, Wikimedia

Line drawing in Britton, N.L., and A. Brown. 1913. An illustrated flora of the northern United States, Canada and the British Possessions . Vol. 1: 192

Common Name

Marsh Foxtail, Knee-jointed Foxtail, Floating Foxtail

Family

Poaceae

Notes

Introduced perennial grass 10-60cm tall, sometimes creeping.  Leaves with a sheath at the base.  Ligule a membrane without a fringe of hairs.  Leaves flat, 2-12cm long, 1-8mm wide, hairless to rough.  Spikelets green, brown, or purplish, 2-4mm long.  Mature seed heads cylindrical.  Seeds with one awn.

Description and photo in G.M. Cunningham, WE Mulham, PL Milthorpe and J H Leigh (1981 and later printings) Plants of Western New South Wales page 53

PlantNET description:  http://plantnet.rbgsyd.nsw.gov.au/cgi-bin/NSWfl.pl?page=nswfl&lvl=sp&name=Alopecurus~geniculatus

ausgrass2 description:  http://ausgrass2.myspecies.info/content/alopecurus-geniculatus