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By "Mcwilliam, Aileen L "
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A redefinition of Penstemon arkansanus Pennell (Scrophulariaceae)
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By: Mcwilliam, Aileen L
Type: Article
In: Phytologia
Volume: 15
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Date: 1967
Page Range: 233--235
Publication Info: Bronx Park, New York H.A. Gleason and H.N. Moldenke
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