Penstemon digitalis species, which can be important for taxonomy. Scientists estimated the genome size for 40% of the species in the genus; using "Flow Cytometry." "Penstemon digitalis" has one of the largest genomes of the genus"Penstemon". Like other "Penstemon" species, it is used in roadside planting because it is easily grown and showy. It is recommended for easy use in gardens from the Midwest to the Atlantic coast and Pacific Northwest by the American Penstemon Society. "Iowa's Living Roadway Profiler" from the Iowa Department of Transportation says that the plant's "decorative seed capsules add interest in the fall and winter". One of
Radioactive contamination from the Rocky Flats Plant tests." As noted by Carl Johnson in Ambio, "Exposures of a large population in the Denver area to plutonium and other radionuclides in the exhaust plumes from the plant date back to 1953." Weapons production at the plant was halted after a combined FBI and EPA raid in 1989 and years of protests. The plant has since been shut down, with its buildings demolished and completely removed from the site. The Rocky Flats Plant was declared a Superfund site in 1989 and began its transformation to a cleanup site in February 1992. Removal of the plant and surface contamination was