⚠ Version 1 of The Plant List has been superseded.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.
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.