Hesperostipa spartea

Species category

Weed

Common name

porcupinegrass

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

Linear to cylindrical

Size

  • Length 12–16 mm 
  • Width 1–1.2 mm 
  • Thickness 1–1.2 mm 

Color

Brown; light brown longitudinal lines

Texture

CallusCallus:
The hard base of grass florets or spikelets, just above the point of disarticulation.
with long, backward pointing hairs; short hairs on the lemmaLemma:
One of two bracts of the grass floret; it is located on the side nearest the embryo and opposite the rachilla.
.

Lemma

CallusCallus:
The hard base of grass florets or spikelets, just above the point of disarticulation.
is sharp pointed. Both callusCallus:
The hard base of grass florets or spikelets, just above the point of disarticulation.
and lemmaLemma:
One of two bracts of the grass floret; it is located on the side nearest the embryo and opposite the rachilla.
are hard. LemmaLemma:
One of two bracts of the grass floret; it is located on the side nearest the embryo and opposite the rachilla.
with a small crown on the apexApical:
The distal end of the fruit or seed away from the point of attachment or attachment scar.
supporting a geniculateGeniculate:
Bent at a sharp angle.
awn.

Palea

Totally enclosed in 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

Long twisted awnAwn:
A narrow, bristle-like organ, as on the glumes or lemmas of grasses (Poaceae).
terminating with a lateral arm.

Identification notes

Point of the callusCallus:
The hard base of grass florets or spikelets, just above the point of disarticulation.
slightly curved.

Noxious weed seed categories

Not listed

AOSA examination list

Not included

Nomenclature

Family

Poaceae

Valid name

Hesperostipa spartea (Trin.) Barkworth

Synonyms

Stipa spartea Trin.

 Hesperostipa spartea,  Callus with long, backward pointing hairs; short hairs on the lemma.
Hesperostipa spartea, Callus with long, backward pointing hairs; short hairs on the lemma.
 Hesperostipa spartea.  Long twisted awn terminating with a lateral arm.
Hesperostipa spartea. Long twisted awn terminating with a lateral arm.