Foxglove Beardtongue (Penstemon digitalis). Plantaginaceae. August 16, 2020 1500 × 1000 Foxglove Beardtongue (Penstemon digitalis). Plantaginaceae. Non-native; naturalized. Throughout. Shawangunk Grasslands, June 2019. Non-native; naturalized. Throughout. This was growing in Shawangunk Grassland. June, 2019.