Alopecurus arundinaceus

Species category

Agricultural, Revegetation or Rangeland

Common name

creeping meadow foxtail

Diagnostic characters

Planting unit

SpikeletSpikelet:
One or more florets that are subtended by a pair of bracts called glumes. Spikelets are pedicellate if located on a pedicle and sessile if attached directly to the rachis. Often spikelets with single florets have remnants of a second floret, usually a lemma.

Shape

SpatulateSpatulate:
Having a narrow base and rounded apex. Pear-shaped.
and glumesGlume:
The pair of chaffy bracts that occur at the base of a grass spikelet, often completely enclosing it.
recurved.

Size

  • Length: 5 m
  • Width: 1.5 mm
  • Thickness: 0.5 mm

Color

Black at the base to yellow at the tip.

Texture

Smooth and shiny

Lemma

Obscured by glumesGlume:
The pair of chaffy bracts that occur at the base of a grass spikelet, often completely enclosing it.
.

Palea

Obscured by glumesGlume:
The pair of chaffy bracts that occur at the base of a grass spikelet, often completely enclosing it.
.

Other structures

Pubescence on keel of glumesGlume:
The pair of chaffy bracts that occur at the base of a grass spikelet, often completely enclosing it.
.

Identification notes

Caryopsis endospermEndosperm:
Nutritive tissue originating from union of the two polar nuclei with a sperm nucleus.
very soft and plastic. Margins of glumesGlume:
The pair of chaffy bracts that occur at the base of a grass spikelet, often completely enclosing it.
rounded inward until near tip, where they curve outward.

Noxious weed seed categories

Not listed

AOSA examination list

Not included

Nomenclature

Family

Poaceae

Valid name

Alopecurus arundinaceus Poir

Synonyms

Alopecurus ventricosus Pers., non (Gouan) Huds.

 Alopecurus arundinaceus.  Caryopsis on the left. Pubescence on the keel of glumes.
Alopecurus arundinaceus. Caryopsis on the left. Pubescence on the keel of glumes.