Plantaginaceae
| Authority | : | Jussieu, 1789 |
| Nederlands | : | Weegbreefamilie |
| English | : | Plantain family |
| Deutsch | : | Wegerichgewächse |
| Penstemon barbatus |
| Authority | : | (Cav.) Roth, 1806 |
| Synonyms | : | Chelone barbata Cav. 1795 |
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| Grand Canyon northern rim (Arizona), USA; 7 August 2017. | |
| Penstemon caespitosus |
| Authority | : | Nutt. ex A.Gray, 1862 |
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| Bryce Canyon National Park (Utah), USA; 8 - 13 August 2017. | ||
| Penstemon comarrhenus |
| Authority | : | A.Gray, 1877 |
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| Grand Canyon northern rim (Arizona), USA; 7 August 2017. | |