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 6–7 mm
• Width 0.5–0.8 mm
• Thickness 0.5–0.8 mm

Color

Black

Texture

Rough

Other structures

Long united scales form 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. 
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Family

Asteraceae

Valid name

Tagetes erecta L.

Synonyms

Tagetes major Gaertn.