Synonyms
Eupatorium arizonicum (A.Gray) Greene
Ageratina prionobia (B.L.Rob.) R.M.King & H.Rob.
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
Eupatorium herbaceum Greene
Ageratina betulifolia (Greene) R.M.King & H.Rob.
Eupatorium prionobium B.L.Rob.