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Desmanthus illinoensis

Species category

Weed

Common name

Illinois bundleflower

Diagnostic characters

Planting unit

True seedTrue seed:
A mature fertilized ovule consisting of an embryo, with or without and external food reserve (e.g., endosperm) enclosed by the testa.

Shape

ObovateObovate:
Inverted egg shaped with apical end the broadest.

Size

  • Length 3 mm
  • Width 2 mm
  • Thickness 1 mm

Color

Reddish-brown to brown

Texture

Smooth with a conspicuous pleurogram line following the margin

Other structures

Pointed hilumHilum:
The scar on the seed coat at the place of its detachment from the seed stalk (funiculus).
 area; hilumHilum:
The scar on the seed coat at the place of its detachment from the seed stalk (funiculus).
 is inconspicuous along the side of the slight beak.

Identification notes

The pleurogram on the flat surface is the most usable identification characteristic.

Noxious weed seed categories

Not listed

AOSA examination list

Not included

Nomenclature

Family

Fabaceae

Valid name

Desmanthus illinoensis (Michx.) MacMill. ex B.L. Rob. & Fernald

Synonyms

Acuan illinoense (Michx.) Kuntze
Mimosa illinoensis Michx.

Desmanthus illinoensis. Seeds are smooth with a conspicuous pleurogram line following the margin. Photo courtesy of Colorado State University, Department of Soil and Crop Sciences.
Desmanthus illinoensis. Seeds are smooth with a conspicuous pleurogram line following the margin. Photo courtesy of Colorado State University, Department of Soil and Crop Sciences.