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Dale T. Lindgren and Daniel M. Schaaf

Penstemon Mitchell, a genus of highly divergent plants, is increasing in popularity, as documented by the number of newly released Penstemon cultivars and the number of recently published books on Penstemon ( Lindgren and Wilde, 2003

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Dale T. Lindgren and Daniel M. Schaaf

cobaea Nutt. × Penstemon triflorus A. Heller) ( Lindgren, 1993 ). Three selections were made in 1997 out of the resultant population of seedlings, DM1, DM2, and DM3. All three selections displayed darker fall foliage color than the parent ‘Husker Red