All specimens assigned to Penstemon:
Displaying 1 - 24 of 24
| Scientific Name | Collectors | Collection Date | Image |
|---|---|---|---|
| Penstemon digitalis Nutt. ex Sims | No Image | ||
| Penstemon fruticosus (Pursh) Greene | No Image | ||
| Penstemon gormanii Greene | No Image | ||
| Penstemon laevigatus Ait. | No Image | ||
| Penstemon ovatus Dougl. ex Hook. | No Image | ||
| Penstemon laevigatus Ait. | No Image | ||
| Penstemon pallidus Small | No Image | ||
| Penstemon nitidus Dougl. ex Benth. | No Image | ||
| Penstemon pallidus Small | No Image | ||
| Penstemon hirsutus (L.) Willd. | Unknown | No Image | |
| Penstemon digitalis Nutt. ex Sims | No Image | ||
| Penstemon laevigatus Ait. | No Image | ||
| Penstemon gracilis Nutt. | No Image | ||
| Penstemon laevigatus Ait. | No Image | ||
| Penstemon hirsutus (L.) Willd. | No Image | ||
| Penstemon pallidus Small | No Image | ||
| Penstemon procerus Dougl. ex Graham | No Image | ||
| Penstemon digitalis Nutt. ex Sims | Unknown | No Image | |
| Penstemon digitalis Nutt. ex Sims | Unknown | No Image | |
| Penstemon hallii Gray | Unknown | No Image | |
| Penstemon procerus Dougl. ex Graham | No Image | ||
| Penstemon digitalis Nutt. ex Sims | 
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| Penstemon digitalis Nutt. ex Sims | 
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| Penstemon digitalis Nutt. ex Sims | 
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