Synonyms
Eupatorium arizonicum (A.Gray) Greene
Eupatorium occidentale var. arizonicum A.Gray
Kyrstenia herbacea Greene
Eupatorium ageratifolium var. herbaceum A.Gray
Eupatorium betulifolium B.L.Rob.
Kyrstenia betulifolia Greene
Kyrstenia arizonica Greene
Ageratina prionobia (B.L.Rob.) R.M.King & H.Rob.
Eupatorium herbaceum Greene
Ageratina betulifolia (Greene) R.M.King & H.Rob.
Eupatorium prionobium B.L.Rob.