| Classification | Asteraceae: Psilostrophe |
| Classification 1 | Asteraceae: Riddellia |
| Classification 2 | Asteraceae: Psilostrophe |
| Classification 3 | Asteraceae: Riddellia |
| Harvard University Herbaria Barcode(s) | 00011497 |
| Type Status | Syntype |
| Collector | Josiah Gregg |
| Collector number | 318 |
| Country | Mexico |
| State | Coahuila |
| Geography | North America: North America (CA, US, MX) (Region): Mexico: Coahuila |
| Locality | Saltillo. Near Ojo de Sant Bernardo |
| Date Collected | 1847-05-06 - 1849 |
| Habitat | Dry gravelly mountain pass |
| GUID | http://purl.oclc.org/net/edu.harvard.huh/guid/uuid/0347f5d5-d9f5-4a1d-bc13-fc1857373c6f |
| Harvard University Herbaria Barcode | 00011497 |
| Herbarium | GH |
| Family | Asteraceae |
| Determination | Psilostrophe gnaphalodes de Candolle |
| Family | Asteraceae |
| Determination | Riddellia arachnoidea A. Gray |
| Determination Remarks | [is label name] |
| Family | Asteraceae |
| Determination | Psilostrophe gnaphalodes de Candolle |
| Determined by | C. B. Heiser |
| Date Determined | 1944 |
| Determination Remarks | [is Current name] |
| Family | Asteraceae |
| Type Status | Syntype |
| Syntype of | Riddellia arachnoidea A. Gray |
| Taxon Reference | (for Riddellia arachnoidea A. Gray) Mem. Amer. Acad. Arts 1849. n.s. 4: 94. |
| Sex | not determined |
| Phenology | Flower |
| Preparation Type | Sheet |
| Preparation Method | Pressed |
| Item Remarks | [Mounted in the lower right corner of the sheet; mounted with Syntype of Gregg 35 (barcode 11496), and non-type specimen of Gregg 34 (barcode 257531)] |
