| Name | Ageratum houstonianum var. multicescens B. L. Robinson |
| Authorship | B. L. Robinson |
| Rank | Variety |
| NomenclaturalStatus | NomLeg |
| Placed in | Ageratum houstonianum Miller |
| Citation | 1916 Proc. Amer. Acad. Arts 51: 532 |
| Holdings | 3 Specimens held in the Harvard University Herbaria identified as Ageratum houstonianum var. multicescens B. L. Robinson |
| Identification made in | [no date] (1), 1967 (1), 1985 (1) |
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