Cynodon dactylon var. aridus

Species category

Agricultural

Common name

Bermudagrass, giant bermudagrass

Diagnostic characters

Planting unit

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

Shape

OvalOval:
Broadly elliptic.

Size

  • Length 1.5 mm
  • Width 0.75 mm
  • Thickness 0.5 mm

Color

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).
) and a light brown floretFloret:
A small flower in a clustered inflorescence (e.g., sunflower, grasses). In grasses, a floret consists of the lemma, palea, stamens, and pistil.

Texture

Moderately rough

Lemma

Usually absent.

Palea

Usually absent.

Other structures

The embryoEmbryo:
A rudimentary plant contained in a seed, usually consisting of a more or less differentiated axis and attached cotyledon(s).
is laterally from the base to 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.

Identification notes

The caryopsisCaryopsis:
The single-seeded fruit or grain of the grass family (Poaceae); the fruit wall (pericarp) is united with the seed coat (testa).
of giant bermudagrass is not usually found in 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.
form in commerce. Giant bermudagrass (var. aridus)is generally larger and has a rougher seed coatSeed coat:
The protective covering of a seed usually composed of the inner and outer integuments. Also called the testa.
than common bermudagrass (var. dactylon).

Noxious weed seed categories

State Noxious Weed: Alabama, Arkansas, DC., Delaware, Florida, Georgia, Louisiana, Maryland, Mississippi, New Jersey, North Carolina, Pennsylvania, South Carolina, Texas, Utah, Virginia, West Virginia

AOSA examination list

Not included

Nomenclature

Family

Poaceae

Valid name

Cynodon dactylon (L.) Pers. var. aridus Harlan & de Wet

From Left to Right: 1.  Cynodon dactylon  var.  aridus  2.  Cynodon dactylon  var.  dactylon . Caryopses are glossy, smooth, and laterally compressed.
From Left to Right: 1. Cynodon dactylon var. aridus 2. Cynodon dactylon var. dactylon. Caryopses are glossy, smooth, and laterally compressed.
 Cynodon dactylon  var.  aridus.  Dark brown caryopsis and a light brown floret. 
Cynodon dactylon var. aridus. Dark brown caryopsis and a light brown floret. 
 Cynodon dactylon  var.  aridus.  Caryopses are moderately rough.
Cynodon dactylon var. aridus. Caryopses are moderately rough.