Dimorphotheca tragus

Species category

Flower

Common name

ox-eye daisy, Cape marigold, Namaqualand daisy, African daisy

Diagnostic characters

Planting unit

AcheneAchene:
A dry, hard, one-chambered, one-seeded indehiscent fruit, as in buckwheat (Fagopyrum) or sunflower (Helianthus). The fruit wall is not united with the seed coat.

Shape

ObovateObovate:
Inverted egg shaped with apical end the broadest.

Size

  • Length 6–6.5 mm
  • Width 5–5.5 mm
  • Thickness 0.5–0.6 mm

Color

Light brown

Texture

Smooth and papery

Other structures

Scar is at the narrow basalBasal:
The base of the fruit or seed opposite the apical end.
end. Large wings have a margin line.

Identification notes

Seed is in a small spatulateSpatulate:
Having a narrow base and rounded apex. Pear-shaped.
structure at the center of the acheneAchene:
A dry, hard, one-chambered, one-seeded indehiscent fruit, as in buckwheat (Fagopyrum) or sunflower (Helianthus). The fruit wall is not united with the seed coat.
.

Noxious weed seed categories

Not listed

AOSA examination list

Not included

Nomenclature

Family

Asteraceae

Valid name

Dimorphotheca tragus (Aiton) DC.

Synonyms

Castalis tragus (Aiton) Norl.
Dimorphotheca aurantiaca DC.

 Dimorphotheca tragus.  Achenes with large wings with a marginal line.
Dimorphotheca tragus. Achenes with large wings with a marginal line.
 Dimorphotheca tragus.  The seed is in a small spatulate structure in the center of the achene.
Dimorphotheca tragus. The seed is in a small spatulate structure in the center of the achene.
 Dimorphotheca tragus.  Achenes.
Dimorphotheca tragus. Achenes.