Pseudoroegneria spicata subsp. inermis

Species category

Agricultural, Revegetation or Rangeland

Common name

beardless wheatgrass

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: 10–11 mm
  • Width: 1.4–1.8 mm
  • Thickness: 0.5–1 mm

Color

Greenish-yellow with gray from caryopsisCaryopsis:
The single-seeded fruit or grain of the grass family (Poaceae); the fruit wall (pericarp) is united with the seed coat (testa).
showing through

Texture

Smooth and glabrousGlabrous:
Lacking hairs or pubescence.

Lemma

Sometimes with a very short awnAwn:
A narrow, bristle-like organ, as on the glumes or lemmas of grasses (Poaceae).
; flat edge above callusCallus:
The hard base of grass florets or spikelets, just above the point of disarticulation.
.

Palea

Margins showing except near apexApical:
The distal end of the fruit or seed away from the point of attachment or attachment scar.
; rounded concavity

Other structures

Lateral groove is above callusCallus:
The hard base of grass florets or spikelets, just above the point of disarticulation.
. RachillaRachilla:
The axis of a spikelet.
is long and V-shaped.

Identification notes

Basal floretsFloret:
A small flower in a clustered inflorescence (e.g., sunflower, grasses). In grasses, a floret consists of the lemma, palea, stamens, and pistil.
sometimes associated with glumesGlume:
The pair of chaffy bracts that occur at the base of a grass spikelet, often completely enclosing it.
, which are nearly the same length as the floretFloret:
A small flower in a clustered inflorescence (e.g., sunflower, grasses). In grasses, a floret consists of the lemma, palea, stamens, and pistil.
. The profile of the floretFloret:
A small flower in a clustered inflorescence (e.g., sunflower, grasses). In grasses, a floret consists of the lemma, palea, stamens, and pistil.
shows it to have rather parallel sides. There is often double gray transverseTransverse:
Set crosswise, crossing or at right angles.
lines on the lemmaLemma:
One of two bracts of the grass floret; it is located on the side nearest the embryo and opposite the rachilla.
. Generally the lemmaLemma:
One of two bracts of the grass floret; it is located on the side nearest the embryo and opposite the rachilla.
is awnless but sometimes short-awned.

Noxious weed seed categories

Not listed

AOSA examination list

Included

Nomenclature

Family

Poaceae

Valid name

Pseudoroegneria spicata (Pursh) Á. Löve subsp. inermis (Scribn. & J.G. Sm.) Á. Löve

Synonyms

Agropyron inerme (Scribn. & J.G. Sm.) Rydb.
Agropyron spicatum Pursh var. inerme (Scribn. & J.G. Sm.) A. Heller

 Pseudoroegneria spicata  (Pursh) Á. Löve ssp.  inermis . Florets with double gray transverse lines on the lemma.
Pseudoroegneria spicata (Pursh) Á. Löve ssp. inermis. Florets with double gray transverse lines on the lemma.