Hordeum pusillum

Species category

Weed

Common name

little barley, little wildbarley

Diagnostic characters

Planting unit

FascicleFascicle:
Much the same as a burr except the spikelet glumes are soft, e.g. buffelgrass.

Shape

SpikeletsSpikelet:
One or more florets that are subtended by a pair of bracts called glumes. Spikelets are pedicellate if located on a pedicle and sessile if attached directly to the rachis. Often spikelets with single florets have remnants of a second floret, usually a lemma.
, cluster of three

Size

  • Length 6–7 mm 
  • Width 1.8–2 mm 
  • Thickness 1–1.3 mm 

Color

Light brown

Texture

Moderately rough on flat surface; glumeGlume:
The pair of chaffy bracts that occur at the base of a grass spikelet, often completely enclosing it.
ends scabrousScabrous:
Rough to the touch, covered with minute points of very short, stiff hairs.
.

Lemma

Broadest in middle with straight taper to either end

Palea

Broad and flat

Other structures

Two pedicellate, sterile spikeletsSpikelet:
One or more florets that are subtended by a pair of bracts called glumes. Spikelets are pedicellate if located on a pedicle and sessile if attached directly to the rachis. Often spikelets with single florets have remnants of a second floret, usually a lemma.
on either side of fertile one

Identification notes

The unit disarticulates with a segment of the rachisRachis:
The central axis of an inflorescence.
. Two lateral spikeletsSpikelet:
One or more florets that are subtended by a pair of bracts called glumes. Spikelets are pedicellate if located on a pedicle and sessile if attached directly to the rachis. Often spikelets with single florets have remnants of a second floret, usually a lemma.
are pedicellate and sterile, with glumesGlume:
The pair of chaffy bracts that occur at the base of a grass spikelet, often completely enclosing it.
wide in the middle and a rudimentary 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 central, fertile floretFloret:
A small flower in a clustered inflorescence (e.g., sunflower, grasses). In grasses, a floret consists of the lemma, palea, stamens, and pistil.
is sessileSessile:
A flower or spikelet with no pedicel therefore attached directly to the central axis (rachis) or other surfaces.
with wide glumesGlume:
The pair of chaffy bracts that occur at the base of a grass spikelet, often completely enclosing it.
.

Noxious weed seed categories

Not listed

AOSA examination list

Not included

Nomenclature

Family

Poaceae

Valid name

Hordeum pusillum Nutt.

Synonyms

Critesion pusillum (Nutt.) Á. Löve
Hordeum pusillum Nutt. var. pubens Hitchc.

 Hordeum pusillum.  Fascicles with two pedicellate, sterile spikelets on either side of a fertile one. 
Hordeum pusillum. Fascicles with two pedicellate, sterile spikelets on either side of a fertile one. 
 Hordeum pusillum.  Fascicles with two lateral spikelets that are pedicellate and sterile, with glumes wide in the middle, and a rudimentary floret.
Hordeum pusillum. Fascicles with two lateral spikelets that are pedicellate and sterile, with glumes wide in the middle, and a rudimentary floret.