Penstemon cobaea Nuttall var. purpureus Pennell. Ozark Cobaea Beardtongue. Phen: Apr-Jun. Hab: Limestone and dolomite glades, calcareous prairies. Dist: Endemic to the Ozarks and AR-OK Coastal Plain.
Origin/Endemic status: Endemic
Synonymy: = FNA17; < Penstemon cobaea Nutt. – Ar, C, F, K4
Heliophily: 9
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