Epilobium halleanum Hausskn.  

Family: Onagraceae

Hall's willowweed

[Epilobium brevistylum var. subfalcatum (Trel.) Munz, moreEpilobium brevistylum var. tenue (Trel.) Jeps., Epilobium glandulosum var. tenue (Trel.) C.L. Hitchc., Epilobium pringleanum Hausskn., Epilobium pringleanum var. tenue (Trel.) Munz]