Sporobolus airoides

Species category

Revegetation or Rangeland

Common name

alkali sacaton

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 1.5–2.2 mm
  • Width 0.8–1 mm
  • Thickness 0.5–0.8 mm

Color

Light brown

Texture

Smooth

Lemma

Central ridge is strong. Base is darker brown.

Palea

Pushed outward by the large caryopsisCaryopsis:
The single-seeded fruit or grain of the grass family (Poaceae); the fruit wall (pericarp) is united with the seed coat (testa).

Other structures

CaryopsisCaryopsis:
The single-seeded fruit or grain of the grass family (Poaceae); the fruit wall (pericarp) is united with the seed coat (testa).
is ovalOval:
Broadly elliptic.
.

Identification notes

EmbryoEmbryo:
A rudimentary plant contained in a seed, usually consisting of a more or less differentiated axis and attached cotyledon(s).
is half the caryopsisCaryopsis:
The single-seeded fruit or grain of the grass family (Poaceae); the fruit wall (pericarp) is united with the seed coat (testa).
length. Seed lots are usually a mixture of floretsFloret:
A small flower in a clustered inflorescence (e.g., sunflower, grasses). In grasses, a floret consists of the lemma, palea, stamens, and pistil.
and caryopsisCaryopsis:
The single-seeded fruit or grain of the grass family (Poaceae); the fruit wall (pericarp) is united with the seed coat (testa).
.

Noxious weed seed categories

Not listed

AOSA examination list

Included

More information

For more information, see ISMA fact sheet, Sporobolus spp.

Nomenclature

Family

Poaceae

Valid name

Sporobolus airoides (Torr.) Torr.

Synonyms

Sagrostis airoides Torr.

From Left to Right:  1. Bottom.  Sporobolus neglectus  2. Bottom.  Sporobolus airoides  3. Bottom.  Sporobolus clandestinus  4.Top.  Sporobolus compositus  5. Top.  Sporobolus giganteus  6. Top.  Sporobolus cryptandrus  .
From Left to Right:  1. Bottom. Sporobolus neglectus 2. Bottom. Sporobolus airoides 3. Bottom. Sporobolus clandestinus 4.Top. Sporobolus compositus 5. Top. Sporobolus giganteus 6. Top. Sporobolus cryptandrus .
From Left to Right:  1.  Sporobolus compositus  2.  Sporobolus airoides  3.  Sporobolus cryptandrus . Caryopsis with an embryo that is half the length of the caryopsis.
From Left to Right:  1. Sporobolus compositus 2. Sporobolus airoides 3. Sporobolus cryptandrus. Caryopsis with an embryo that is half the length of the caryopsis.