Muhlenbergia rigens

Species category

Weed

Common name

deergrass, deer muhly

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 3–3.5 mm
  • Width 0.5–0.6 mm
  • Thickness 0.5–0.6 mm

Color

Light brown

Texture

ScabrousScabrous:
Rough to the touch, covered with minute points of very short, stiff hairs.
; basalBasal:
The base of the fruit or seed opposite the apical end.
half of lemmaLemma:
One of two bracts of the grass floret; it is located on the side nearest the embryo and opposite the rachilla.
with appressedAppressed:
Pressed close or lying flat against something.
hairs.

Lemma

Awnless with central longitudinal rib

Palea

Margins often above lemmaLemma:
One of two bracts of the grass floret; it is located on the side nearest the embryo and opposite the rachilla.

Other structures

RachillaRachilla:
The axis of a spikelet.
not present.

Identification notes

CallusCallus:
The hard base of grass florets or spikelets, just above the point of disarticulation.
with silky hairs. Dark brown caryopsisCaryopsis:
The single-seeded fruit or grain of the grass family (Poaceae); the fruit wall (pericarp) is united with the seed coat (testa).
seen through paleaPalea:
One of the thin bracts of grass floret enclosing the fruit (caryopsis) that is located on the side opposite the embryo.
.

Noxious weed seed categories

Not listed

AOSA examination list

Not included

Nomenclature

Family

Poaceae

Valid name

Muhlenbergia rigens (Benth.) Hitchc.

Synonyms

Crypsinna rigens (Benth.) M.E. Jones
Crypsinna setiglumis M.E. Jones
Epicampes leptoura Piper
Epicampes rigens Benth.
Muhlenbergia leptoura (Piper) Hitchc.
Muhlenbergia marshii I.M. Johnst.
Muhlenbergia mundula I.M. Johnst.

 Muhlenbergia rigens.  Scabrous florets with appressed hairs on the basal half of the lemma.
Muhlenbergia rigens. Scabrous florets with appressed hairs on the basal half of the lemma.
 Muhlenbergia rigens.  Scabrous florets with a dark brown caryopsis that can be seen through the palea.
Muhlenbergia rigens. Scabrous florets with a dark brown caryopsis that can be seen through the palea.