If you want a perennial flower that is both beautiful and easy to maintain, pineleaf penstemon (Penstemon pinifolius) definitely fits the bill. That's because this perennial has delicate ...
The white-margined penstemon (Penstemon albomarginatus) grows in four distinct population centers: Clark and Nye counties in Nevada; San Bernardino County in California; and Arizona’s Mohave County.
Every gardener needs this kind of workhorse in the garden, and for many, the obvious choice to fill this niche is beardtongue (Penstemon spp.). It comes in many varieties, meaning there is one for ...
Lawrence, T. J. and S. L. Datwyler. 2016. Testing the hypothesis of allopolyploidy in the origin of Penstemon azureus (Plantaginaceae). Frontiers in Ecology and ...
The Service found that the Center’s petitions to protect the white-margined penstemon and the Railroad Valley toad present substantial scientific evidence that endangered species protections may be ...