Leaf blades weakly folded along midribs, not curved, 10-15 mm wide.

Flowering Jul-Sep. Ponds; of conservation concern; 20-100+ m; Mass., R.I.

As discussed above, the appro­priate name for this entity is Eupatorium novaeangliae (Fernald) V. Sullivan ex A. Haines & Sorie, Botanical Notes 11: 2. 2005.

Variety novaeangliae is in the Center for Plant Conservation´s National Collection of Endangered Plants.