American hemp, more...clasping dogbane, Indian hemp, Indian hemp
[Apocynum cannabinum var. hypericifolium (Aiton) A. Gray, moreApocynum cannabinum var. pubescens (Mitchell ex R. Br.) Woodson, Apocynum pubescens Mitchell ex R. Br., Apocynum sibiricum Jacquin, Apocynum sibiricum var. cordigerum (Greene) Fernald]
