Elymus patagonicus

Species category

Weed

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

EllipticElliptic:
Outline of an ellipse; greatest width midway sloping to an equally pointed apex and base.

Size

  • Length 8–10 mm
  • Width 1.5–1.8 mm
  • Thickness 1.4–1.7 mm

Color

Gray to brown

Texture

Smooth

Lemma

Lanceolate; small hump near the callusCallus:
The hard base of grass florets or spikelets, just above the point of disarticulation.
.

Palea

Keels are strongly ciliate. PaleaPalea:
One of the thin bracts of grass floret enclosing the fruit (caryopsis) that is located on the side opposite the embryo.
is the same length as the lemmaLemma:
One of two bracts of the grass floret; it is located on the side nearest the embryo and opposite the rachilla.
.

Other structures

Short awnsAwn:
A narrow, bristle-like organ, as on the glumes or lemmas of grasses (Poaceae).
; not laterally compressed.

Identification notes

RachillaRachilla:
The axis of a spikelet.
is glabrousGlabrous:
Lacking hairs or pubescence.
and the apexApical:
The distal end of the fruit or seed away from the point of attachment or attachment scar.
is flared.

Noxious weed seed categories

Not listed

AOSA examination list

Not included

Nomenclature

Family

Poaceae

Valid name

Elymus patagonicus Speg.

 Elymus patagonicus.  Florets with lanceolate lemmas and a small hump near the callus.
Elymus patagonicus. Florets with lanceolate lemmas and a small hump near the callus.