Elymus virginicus

Species category

Weed

Common name

Virginia wildrye

Diagnostic characters

Planting unit

FloretFloret:
A small flower in a clustered inflorescence (e.g., sunflower, grasses). In grasses, a floret consists of the lemma, palea, stamens, and pistil.

Shape

Lanceolate

Size

  • Length 8 mm
  • Width 1.5 mm
  • Thickness 1 mm

Color

Brown

Texture

Mostly glabrousGlabrous:
Lacking hairs or pubescence.
with some scabrousScabrous:
Rough to the touch, covered with minute points of very short, stiff hairs.
hairs at the tips

Lemma

EllipticElliptic:
Outline of an ellipse; greatest width midway sloping to an equally pointed apex and base.
and tapers to a narrow base; sparsely scabrousScabrous:
Rough to the touch, covered with minute points of very short, stiff hairs.
on top.

Palea

Broad, smoothly concave and glabrousGlabrous:
Lacking hairs or pubescence.

Other structures

AwnsAwn:
A narrow, bristle-like organ, as on the glumes or lemmas of grasses (Poaceae).
straight about 10 mm long; rachillaRachilla:
The axis of a spikelet.
is glabrousGlabrous:
Lacking hairs or pubescence.
.

Identification notes

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.
has two large, thick, and bowed glumesGlume:
The pair of chaffy bracts that occur at the base of a grass spikelet, often completely enclosing it.
that often stay associated with the basal floretFloret:
A small flower in a clustered inflorescence (e.g., sunflower, grasses). In grasses, a floret consists of the lemma, palea, stamens, and pistil.
. GlumesGlume:
The pair of chaffy bracts that occur at the base of a grass spikelet, often completely enclosing it.
tend to be lateral to the basal floretFloret:
A small flower in a clustered inflorescence (e.g., sunflower, grasses). In grasses, a floret consists of the lemma, palea, stamens, and pistil.
. FloretsFloret:
A small flower in a clustered inflorescence (e.g., sunflower, grasses). In grasses, a floret consists of the lemma, palea, stamens, and pistil.
have a characteristic narrow base, giving them a spatulateSpatulate:
Having a narrow base and rounded apex. Pear-shaped.
appearance.

Noxious weed seed categories

Not listed

AOSA examination list

Included

Nomenclature

Family

Poaceae

Valid name

Elymus virginicus L.

 Elymus virginicus.  Florets are mostly glabrous with some scabrous hairs at the tips. 
Elymus virginicus. Florets are mostly glabrous with some scabrous hairs at the tips. 
 Elymus virginicus.  Spikelets have two large, thick, and bowed glumes that often stay associated with the basal floret.  
Elymus virginicus. Spikelets have two large, thick, and bowed glumes that often stay associated with the basal floret.