By the Author
Columbines
Fresh from his award-winning monograph on penstemons, Robert Nold turns his attention to one of the best-loved - and most frequently misunderstood - groups of…
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Penstemons
With some 270 species, Penstemon is the largest genus endemic to North America, with examples to be found in every state in the continental U.S.…
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High and Dry
Gardeners in the Interior West and Great Plains face a daunting challenge: a harsh, semi-arid climate of scorching summers and brutally cold winters. These climatic…