Ageratum houstonianum var. typicum B.L.Rob.
First published in Contr. Gray Herb. 68: 5 (1923), not validly publ.
This name is a synonym of Ageratum houstonianum
POWO follows these authorities in synonymising this name:
- Govaerts, R., Nic Lughadha, E., Black, N., Turner, R. & Paton, A. (2021). The World Checklist of Vascular Plants, a continuously updated resource for exploring global plant diversity. https://doi.org/10.1038/s41597-021-00997-6. Scientific Data 8: 215. [Cited as Ageratum houstonianum Mill..]
Other Kew resources that provide information on this taxon:
Kew Names and Taxonomic Backbone