Apocynum

noun

Apoc·​y·​num ə-ˈpäs-ə-nəm 

: a genus of chiefly American perennial herbs of the dogbane family (Apocynaceae) with opposite leaves and small white or pink flowers comprising the dogbanes of which several (especially A. androsaemifolium and A. cannabium) are the source of substances with physiological activity resembling digitalis see indian hemp sense 1