| Classification | Asclepiadaceae: Cynanchum |
| Classification 1 | Asclepiadaceae: Metastelma |
| Harvard University Herbaria Barcode(s) | 00046489 |
| Type Status | Holotype |
| Collector | Edw. Palmer |
| Collector number | 223 |
| Country | Mexico |
| State | Sonora |
| Geography | North America: North America (CA, US, MX) (Region): Mexico: Sonora: Guaymas |
| Locality | Guaymas |
| Date Collected | 1887-09-** |
| GUID | http://purl.oclc.org/net/edu.harvard.huh/guid/uuid/53eeea7c-e608-489e-9132-2b49a08c2d19 |
| Harvard University Herbaria Barcode | 00046489 |
| Herbarium | GH |
| Family | Asclepiadaceae |
| Determination | Cynanchum arizonicum (A. Gray) Shinners |
| Determined by | E. Sundell |
| Date Determined | 1990 |
| Family | Asclepiadaceae |
| Determination | Metastelma arizonicum A. Gray |
| Determined by | M. Fishbein |
| Date Determined | 1997 |
| Determination Remarks | [is Current name] |
| Family | Asclepiadaceae |
| Type Status | Holotype |
| Holotype of | Metastelma albiflorum S. Watson |
| Verified by | M. Fishbein |
| Taxon Reference | (for Metastelma albiflorum S. Watson) Proc. Amer. Acad. Arts 1888. 24: 60. |
| Sex | not determined |
| Phenology | Flower |
| Preparation Type | Sheet |
| Preparation Method | Pressed |
