Bromus catharticus var. catharticus

Species category

Agricultural, Weed

Common name

prairie grass, rescue grass, Schrader's bromegrass

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

Lanceolate

Size

  • Length: 10–15 mm
  • Width: 1.8–2 mm
  • Thickness: 1–1.5 mm 

Color

Brown

Texture

GlabrousGlabrous:
Lacking hairs or pubescence.
and smooth, sometimes with sparse and short hairs.

Lemma

Long pointed and laterally folded. Strong longitudinal nerves; no awnsAwn:
A narrow, bristle-like organ, as on the glumes or lemmas of grasses (Poaceae).
.

Palea

Obscured by being folded into the 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

RachillaRachilla:
The axis of a spikelet.
scar is not parallel with the rachillaRachilla:
The axis of a spikelet.
axis.

Identification notes

Bromus catharticus is strongly folded laterally. It can be distinguished from Bromus marginatus by being thicker and by having more conspicuous longitudinal nerves on the lemmaLemma:
One of two bracts of the grass floret; it is located on the side nearest the embryo and opposite the rachilla.
. 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 laterally compressed.

Noxious weed seed categories

Not listed

AOSA examination list

Included

Nomenclature

Family

Poaceae

Valid name

Bromus catharticus Vahl var. catharticus

Synonyms

Bromus haenkeanus (J. Presl) Kunth
Bromus mathewsii Steud.
Bromus schraderi Kunth
Bromus strictus Brongn.
Bromus tacna Steud. ex Lechl., nom. nud.
Bromus unioloides Kunth
Bromus unioloides Kunth var. unioloides
Bromus willdenowii Kunth
Ceratochloa cathartica (Vahl) Herter
Ceratochloa haenkeana J. Presl

 Bromus catharticus  var.  catharticus.  Thick florets with conspicuous longitudinal nerves on the lemma.
Bromus catharticus var. catharticus. Thick florets with conspicuous longitudinal nerves on the lemma.
 Bromus catharticus  var.  catharticus.  Florets are glabrous and smooth, sometimes with sparse and short hairs. 
Bromus catharticus var. catharticus. Florets are glabrous and smooth, sometimes with sparse and short hairs. 
 Bromus catharticus  var.  catharticus.  Florets are glabrous and smooth, sometimes with sparse and short hairs. 
Bromus catharticus var. catharticus. Florets are glabrous and smooth, sometimes with sparse and short hairs.