Euphorbia terracina

Species category

Weed

Common name

Geraldton carnation weed

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

Cylindrical to ovalOval:
Broadly elliptic.

Size

  • Length 2–2.5 mm
  • Width 1.5–1.9 mm
  • Thickness 1.5–1.9 mm

Color

Gray with brown mottling

Texture

Rough

Other structures

HilumHilum:
The scar on the seed coat at the place of its detachment from the seed stalk (funiculus).
is oblique with a suspended disc caruncleCaruncle:
An appendage or outgrowth of the outer integument of the seed, e.g. leafy spurge.
.

Identification notes

Seeds with a deep circle on the apexApical:
The distal end of the fruit or seed away from the point of attachment or attachment scar.
(chalazaChalaza:
End of seed opposite the micropyle.
) and a thin rapheRaphe:
A seam or ridge found on seeds.
.

Noxious weed seed categories

State Noxious Weed: California
Federal

Learn more on ITP's Federal Noxious Weed Disseminules tool.

AOSA examination list

Not included

Nomenclature

Family

Euphorbiaceae

Valid name

Euphorbia terracina L.

 Euphorbia terracina.  Seeds with a hilum that is oblique with a suspended disc caruncle. Photo by Julia Scher, USDA-APHIS-PPQ.
Euphorbia terracina. Seeds with a hilum that is oblique with a suspended disc caruncle. Photo by Julia Scher, USDA-APHIS-PPQ.
 Euphorbia terracina.  Seeds with a deep circle on the apex and a thin raphe. Photo by Julia Scher, USDA-APHIS-PPQ.
Euphorbia terracina. Seeds with a deep circle on the apex and a thin raphe. Photo by Julia Scher, USDA-APHIS-PPQ.
 Euphorbia terracina.  Seed capsule. Photo by Julia Scher, USDA-APHIS-PPQ.
Euphorbia terracina. Seed capsule. Photo by Julia Scher, USDA-APHIS-PPQ.