| Classification | Asteraceae: Ageratum |
| Classification 1 | Asteraceae: Caelestina |
| Harvard University Herbaria Barcode(s) | 00000667 |
| Type Status | Holotype |
| Collector | C. F. L. C. Ervendberg |
| Collector number | 100 |
| Country | Mexico |
| Geography | North America: North America (CA, US, MX) (Region): Mexico |
| Locality | Wartenberg, near Tantoyuca, prov. Huasteca |
| Date Collected | 1858 |
| GUID | http://purl.oclc.org/net/edu.harvard.huh/guid/uuid/cc5938ce-1d29-4405-a495-6587af0b7619 |
| Harvard University Herbaria Barcode | 00000667 |
| Herbarium | GH |
| Family | Asteraceae |
| Type Status | Holotype |
| Holotype of | Ageratum houstonianum var. multicescens B. L. Robinson |
| Verified by | V. M. Bates |
| Date Determined | 1985 |
| Taxon Reference | (for Ageratum houstonianum var. multicescens B. L. Robinson) Proc. Amer. Acad. Arts 1916. 51: 532. |
| Family | Asteraceae |
| Type Status | Holotype |
| Holotype of | Ageratum houstonianum var. multicescens B. L. Robinson |
| Verified by | M. F. Johnson |
| Date Determined | 1967 |
| Taxon Reference | (for Ageratum houstonianum var. multicescens B. L. Robinson) Proc. Amer. Acad. Arts 1916. 51: 532. |
| Family | Asteraceae |
| Type Status | Holotype |
| Holotype of | Ageratum houstonianum f. isochroum B. L. Robinson |
| Verified by | M. F. Johnson |
| Date Determined | 1967 |
| Determination Remarks | Ageratum houstonianum Miller var. muticescens Robinson forma isochroum Robins. [forma illeg. penciled to the side of label] |
| Taxon Reference | (for Ageratum houstonianum f. isochroum B. L. Robinson) Contr. Gray Herb. 1923. 68: 6. |
| Family | Asteraceae |
| Determination | Ageratum houstonianum var. multicescens B. L. Robinson |
| Determined by | B. L. Robinson |
| Determination Remarks | [current name] |
| Family | Asteraceae |
| Determination | Caelestina ageratoides var. latifolia de Candolle |
| Determination Remarks | [label name] |
| Annotation Text | (=C. Corymbosa, DC) [ written underneath determination] |
| Family | Asteraceae |
| Determination | Ageratum conyzoides Linnaeus |
| Determined by | J.M.G. |
| Annotation Text | [written in pencil on sheet] |
| Sex | not determined |
| Phenology | Flower |
| Preparation Type | Sheet |
| Preparation Method | Pressed |
