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

Oblanceolate

Size

• Length: 2.5–3 mm
• Width: 0.5–1 mm
• Thickness: 0.5–1 mm

Color

Purple to brown

Texture

Irregular longitudinal ridges

Other structures

Three to four scale pappusPappus:
Modified calyx in Asteraceae, composed of hairs, bristles, awns, or scales. The pappus-like structure attached to milkweed seeds is termed a coma. 

Family

Asteraceae

Valid name

Ammobium alatum R. Br.