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

SpatulateSpatulate:
Having a narrow base and rounded apex. Pear-shaped.

Size

• Length 9–11 mm
• Width 3–4 mm
• Thickness 1.5–2 mm

Color

Black

Texture

Finely granularGranular:
Resembling or consisting of small grains or particles.
with many longitudinal lines

Other structures

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 on the broad end

Family

Asteraceae

Valid name

Dahlia Cav.