⚠ Version 1 of The Plant List has been superseded.

This name is in version 1.1 of The Plant List, record gcc-53682, with some changes.

Eupatorium rugosum var. angustatum (A.Gray) S.F.Blake is a synonym of Ageratina altissima var. altissima (L.) R.M.King & H.Rob.

This name is a synonym of Ageratina altissima var. altissima (L.) R.M.King & H.Rob..

The record derives from TICA which reports it as a synonym (record 475577BA-BA6B-4CC9-9965-68102E7E903B) with original publication details: Rhodora 43 557 1941.

Full publication details for this name can be found in IPNI: urn:lsid:ipni.org:names:100873-2.