| Classification | Plantaginaceae: Penstemon | 
| Harvard University Herbaria Barcode(s) | 02002059 | 
| Collector | U. T. Waterfall | 
| Collector number | 4173 | 
| Country | United States of America | 
| State | Texas | 
| Geography | North America: North America (CA, US, MX) (Region): United States of America: Texas: Culberson County | 
| Locality | 13 miles east of Van Horn | 
| Date Collected | 1942-08-21 | 
| Habitat | Growing on a sandy ridge among large yuccas | 
| Container | Plants of the Transpecos Region of Southwestern Texas | 
| Project | US and Canada - Mass Digitization | 
| GUID | http://purl.oclc.org/net/edu.harvard.huh/guid/uuid/32ec8b06-6d3e-4b20-9f45-c86f3168234c | 
| Harvard University Herbaria Barcode | 02002059 | 
| Herbarium | GH | 
| Family | Plantaginaceae | 
| Determination | Penstemon ambiguus Torrey | 
| Determination Remarks | [filed under] [current name] | 
| Sex | not determined | 
| Phenology | NotDetermined | 
| Preparation Type | Sheet | 
| Preparation Method | Pressed |