Aristida adscensionis

Species category

Weed

Common name

sixweeks threeawn

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

Size

  • Length: 12.5 mm
  • Width: 0.5 mm
  • Thickness: 0.5 mm

Color

Light brown

Texture

Smooth

Lemma

Hard, completely enfolding 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.
.

Palea

PaleaPalea:
One of the thin bracts of grass floret enclosing the fruit (caryopsis) that is located on the side opposite the embryo.
hidden beneath lemmaLemma:
One of two bracts of the grass floret; it is located on the side nearest the embryo and opposite the rachilla.
.

Other structures

LemmaLemma:
One of two bracts of the grass floret; it is located on the side nearest the embryo and opposite the rachilla.
with three long awnsAwn:
A narrow, bristle-like organ, as on the glumes or lemmas of grasses (Poaceae).
. Sharp, pointed, and pubescentPubescent:
Having hairs.
callus.

Identification notes

Single floretsFloret:
A small flower in a clustered inflorescence (e.g., sunflower, grasses). In grasses, a floret consists of the lemma, palea, stamens, and pistil.
are borne within the glumesGlume:
The pair of chaffy bracts that occur at the base of a grass spikelet, often completely enclosing it.
. Sharp pointed callusCallus:
The hard base of grass florets or spikelets, just above the point of disarticulation.
very pubescentPubescent:
Having hairs.
.

Noxious weed seed categories

State Noxious Weed: Hawaii

AOSA examination list

Not included

Nomenclature

Family

Poaceae

Valid name

Aristida adscensionis L.

Synonyms

Aristida adscensionis L. var. abortiva Beetle
Aristida adscensionis L. var. modesta Hack.
Aristida fasciculata Torr.

 Aristida adscensionis.  Lemma with three long awns. Sharp, pointed, and pubescent callus.
Aristida adscensionis. Lemma with three long awns. Sharp, pointed, and pubescent callus.