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 3–4 mm
• Width 1.7–2.5 mm
• Thickness 0–1 mm

Color

The center is brown. The wings and tubercles are white.

Texture

The center is striate with linear rows of tubercles.

Other structures

Large wings are attached to the margin except at the pappusPappus:
Modified calyx in Asteraceae, composed of hairs, bristles, awns, or scales. The pappus-like structure attached to milkweed seeds is termed a coma. 
crown.

Family

Asteraceae

Valid name

Sanvitalia procumbens Lam.

Synonyms

Sanvitalia angustifolia A. Gray