Penstemon Lyallii, or more commonly know as Lyall's Beardtongue, is a subshrub forb/herb with green foliage and purple flowers of the genus Penstemon. It has a slow growth rate and a height of 2.5 feet at maturity. Its duration is perennial which means it will grow year after year. It's active growth period is spring and summer, blooms during late spring, is intolerant of shade and is routinely available commercially. Penstemon Lyallii or Lyall's Beardtongue's floral region is North America US Lower 48, specifically in the states of Idaho and Montana.
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