Penstemon tenuiflorus explained

Penstemon tenuiflorus, commonly known as eastern whiteflower beardtongue, is a species of flowering plant in the plantain family. It is native only to a small area of the Southeastern United States, in the southern Interior Low Plateau and Black Belt of Alabama and Mississippi.^[1] Its preferred habitat is limestone glades and woodlands.^[2]

Notes and References

1. Web site: Flora of the Southern and Mid-Atlantic States.
2. https://www.jstor.org/stable/4034193 The Comparative Biology of the Two Related Species Penstemon tenuiflorus Pennell and P. hirsutus (L.) Willd. (Scrophulariaceae, Section Graciles): IV. Effects of Shade, Drought, and Soil Type on Survival and Growth