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

Linear

Size

• Length: 1.5–2 mm
• Width: 0.3–0.5 mm
• Thickness: 0.3–0.5 mm

Color

Black; base and apexApical:
The distal end of the fruit or seed away from the point of attachment or attachment scar.
are white.

Texture

Striate with small rectangular boxes

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. 
is white and barbed.

Family

Asteraceae

Valid name

Ageratina adenophora (Spreng.) R.M. King & H. Rob.

Synonyms

Eupatorium adenophorum Spreng.
Eupatorium glandulosum Kunth, non Michx.