PhysOrg Posted July 5, 2016 Share Posted July 5, 2016 The beautiful flowers and impressive diversity of a large genus of roughly 250 species North American and East Asian flowering plants have inspired scientists and gardeners alike. The North American genus of perennial herbs and sub-shrubs (Penstemon) have diversified in their vegetative and habitat specialization, but perhaps most impressive is the floral diversity. Read the full article on PhysOrg Link to comment Share on other sites More sharing options...
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