| Taxon | Collector | Location | Type Status | Barcode | |
|---|---|---|---|---|---|
| Penstemon angustifolius var. dulcis Neese | D. Tilley 600 with D. Atwood, 13 Jun 1999 | United States of America. Utah. Millard Co. Highway 125 Mile marker 8, just south of Oak City. | 584977 |  | |
| Penstemon angustifolius var. dulcis Neese | S. Goodrich 14231 30 Jun 1980 | United States of America. Utah. Millard Co. Canyon Mountains, Clay Springs Wash, 5.5 miles, 195° from Oak City. | 569919 |  | |
| Penstemon angustifolius var. dulcis Neese | E. Rose 1521 08 Jun 1971 | United States of America. Utah. Juab Co. Delta. | 569916 |  |