| Classification | Apocynaceae |
| Harvard University Herbaria Barcode(s) | 00040851 |
| Type Status | Holotype |
| Collector | C. Wright |
| Collector number | 558 |
| Country | United States of America |
| State | Texas |
| Geography | North America: North America (CA, US, MX) (Region): United States of America: Texas |
| Locality | Western Texas to El Paso, New Mexico [Mountains beyond the Limpio] |
| Date Collected | 1849-10-** |
| GUID | http://purl.oclc.org/net/edu.harvard.huh/guid/uuid/237ba64b-cd9e-4334-8ac1-e48f854a14ee |
| Harvard University Herbaria Barcode | 00040851 |
| Herbarium | GH |
| Family | Apocynaceae |
| Type Status | Holotype |
| Holotype of | Macrosiphonia wrightii A. Gray |
| Determination Remarks | [is filed under name] |
| Taxon Reference | (for Macrosiphonia wrightii A. Gray) Syn. Fl. N. Amer. 1878. 2(1): 83. |
| Sex | not determined |
| Phenology | Flower |
| Preparation Type | Sheet |
| Preparation Method | Pressed |
