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Eutrochium maculatum

Species category

Flower, Weed

Common name

spotted joe pye weed, spotted trumpetweed

Diagnostic characters

Planting unit

True seedTrue seed:
A mature fertilized ovule consisting of an embryo, with or without and external food reserve (e.g., endosperm) enclosed by the testa.

Shape

Oblanceolate

Size

  • Length 3.6–4.8 mm
  • Width 0.6–0.8 mm
  • Thickness 0.6–0.8 mm

Color

Black with a white 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

Texture

Smooth

Other structures

Four strong longitudinal ribs

Identification notes

Slight indentation below 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. PappusPappus:
Modified calyx in Asteraceae, composed of hairs, bristles, awns, or scales. The pappus-like structure attached to milkweed seeds is termed a coma. 
 may be present.

Noxious weed seed categories

Not listed

AOSA examination list

Not included

Nomenclature

Family

Asteraceae

Valid name

Eutrochium maculatum (L.) E.E. Lamont

Synonyms

Eupatoriadelphus maculatus (L.) R.M. King & H. Rob.
Eupatorium maculatum L.
Eupatorium purpureum L. var. maculatum (L.) Darl.

Eutrochium maculatum. Seeds are black with a white pappus crown.
Eutrochium maculatum. Seeds are black with a white pappus crown.
Eutrochium maculatum. Seeds are black with a white pappus crown; pappus is sometimes present.
Eutrochium maculatum. Seeds are black with a white pappus crown; pappus is sometimes present.