Trifolium nigrescens

Species category

Weed

Common name

small white clover

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

Mitten

Size

  • Length 1–1.1 mm
  • Width 0.6–0.9 mm
  • Thickness 0.5–0.7 mm

Color

Light to dark brown

Texture

Smooth

Other structures

Often a small hump is present on the cotyledonCotyledon:
The modified storage leaf or pair of leaves of an embryo and seedling (see primary leaf).
side above the hilumHilum:
The scar on the seed coat at the place of its detachment from the seed stalk (funiculus).
.

Identification notes

Very fine reticulationReticulated:
Resembling a net or network, especially having veins, fibers, or lines crossing the surface.  
seen on the seed surface. The axes of the radical and cotyledonCotyledon:
The modified storage leaf or pair of leaves of an embryo and seedling (see primary leaf).
lobes are not parallel. Often there is a line on the seed surface separating the two lobes.

Noxious weed seed categories

Not listed

AOSA examination list

Not included

Nomenclature

Family

Fabaceae

Valid name

Trifolium nigrescens Viv.

 Trifolium nigrescens.  True seeds with a small hump on the cotyledon side above the hilum.
Trifolium nigrescens. True seeds with a small hump on the cotyledon side above the hilum.