⚠ Version 1 of The Plant List has been superseded.

This name is in version 1.1 of The Plant List, record gcc-68021, with some changes.

Ageratum houstonianum var. angustatum B.L.Rob. is a synonym of Ageratum houstonianum Mill.

This name is a synonym of Ageratum houstonianum Mill..

The record derives from TICA which reports it as a synonym (record 800F480F-6B6E-409A-A3D3-DBB79D7E26FC) with original publication details: Contr. Gray Herb. 68 6 1923.

Full publication details for this name can be found in IPNI: urn:lsid:ipni.org:names:7119-2.