| Classification | Asclepiadaceae: Cynanchum |
| Classification 1 | Asclepiadaceae: Metastelma |
| Harvard University Herbaria Barcode(s) | 00046499 |
| Type Status | Holotype, Lectotype |
| Collector | Edw. Palmer |
| Collector number | 824 |
| Country | United States of America |
| State | Texas |
| Geography | North America: North America (CA, US, MX) (Region): United States of America: Texas: Webb County: Laredo |
| Locality | On the Rio Grande |
| Date Collected | 1879-08-** |
| GUID | http://purl.oclc.org/net/edu.harvard.huh/guid/uuid/f74d8ec5-bcd4-43ac-a26f-b679d539da18 |
| Harvard University Herbaria Barcode | 00046499 |
| Herbarium | GH |
| Family | Asclepiadaceae |
| Determination | Cynanchum mccartii Shinners |
| Determined by | J. Henrickson (TEX) |
| Date Determined | 1986-07-02 |
| Family | Asclepiadaceae |
| Determination | Metastelma palmeri S. Watson |
| Determined by | S. Watson |
| Determination Remarks | [S. Watson (scripsit)] [is label name] [is Current name] |
| Annotation Text | n. sp. |
| Family | Asclepiadaceae |
| Type Status | Holotype |
| Holotype of | Metastelma palmeri S. Watson |
| Verified by | J. Henrickson (TEX) |
| Date Determined | 1986-07-02 |
| Taxon Reference | (for Metastelma palmeri S. Watson) Proc. Amer. Acad. Arts 1883. 18: 115. |
| Family | Asclepiadaceae |
| Type Status | Holotype |
| Holotype of | Metastelma palmeri S. Watson |
| Verified by | M. Fishbein (ARIZ) |
| Date Determined | 1997-07-** |
| Taxon Reference | (for Metastelma palmeri S. Watson) Proc. Amer. Acad. Arts 1883. 18: 115. |
| Family | Asclepiadaceae |
| Type Status | Lectotype |
| Lectotype of | Metastelma palmeri S. Watson |
| Verified by | W. T. Kittredge |
| Date Determined | 2008 |
| Taxon Reference | (for Metastelma palmeri S. Watson) Proc. Amer. Acad. Arts 1883. 18: 115. |
| Sex | not determined |
| Phenology | Flower |
| Preparation Type | Sheet |
| Preparation Method | Pressed |
