The Main Plant entry for Penstemons (Penstemon)

"Although widespread across North America, and found in habitats ranging from open desert to moist forests, and up to the alpine zone, they are not typically common within their range.

Although penstemons are among the most attractive native flowers of North America, Europe has always been far more active in their cultivation, and hundreds of hybrids have been developed there since the early 19th century.

A number of different species have been used in the hybridization process, notably P. cobaeus and P. hartwegii.

In North America, penstemons are often used in xeriscape landscaping, as many are native to desert or alpine regions and thus quite hardy. One of the largest collections of penstemons in North America is found at The Arboretum at Flagstaff, Arizona, which hosts a Penstemon Festival each summer."

Taken from wikipedia's page at: http://en.wikipedia.org/wiki/P...

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