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
Recreational drug use part of the milieu of drug taking. The reasons for drug use appear to have as much to do with needs for friendship, pleasure and status as they do with unhappiness or poverty. Becoming a drug taker, to many people, is a positive affirmation rather than a negative experience.” Anthropological research has suggested that humans "may have evolved to counter-exploit plant neurotoxins". The ability to use botanical chemicals to serve the function of endogenous neurotransmitters may have improved survival rates, conferring an evolutionary advantage. A typically restrictive prehistoric diet may have emphasised the apparent benefit of consuming psychoactive drugs, which