Acalypha virginica

Species category

Weed

Common name

Virginia threeseed mercury

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: 1.5 mm
  • Width: 1 mm
  • Thickness: 1.1 mm

Color

Olive-brown with brown spots

Texture

Many small longitudinal lines.

Other structures

Longitudinal suture (rapheRaphe:
A seam or ridge found on seeds.
) from hilumHilum:
The scar on the seed coat at the place of its detachment from the seed stalk (funiculus).
to apexApical:
The distal end of the fruit or seed away from the point of attachment or attachment scar.
.

Identification notes

Thin caruncleCaruncle:
An appendage or outgrowth of the outer integument of the seed, e.g. leafy spurge.
associated with hilumHilum:
The scar on the seed coat at the place of its detachment from the seed stalk (funiculus).
.

Noxious weed seed categories

Not listed

AOSA examination list

Included

Nomenclature

Family

Euphorbiaceae

Valid name

Acalypha virginica L.

 Acalypha virginica.  Thin caruncle associated with hilum.
Acalypha virginica. Thin caruncle associated with hilum.
 Acalypha virginica.  Multiple views of seed. Photo courtesy of USDA-APHIS-PPQ.
Acalypha virginica. Multiple views of seed. Photo courtesy of USDA-APHIS-PPQ.