The Vascular Plants of Iowa
An Annotated Checklist and Natural History
University of Iowa Press Digital Editions
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Iowa and Its Flora
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Angiosperms: Dicotyledons
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Apiaceae (Umbelliferae)
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Penstemon Mitchell
7 Species found for this Genus > Penstemon Mitchell
Penstemon albidus Nutt.
Penstemon cobaea Nutt.
Penstemon digitalis Nutt.
Penstemon gracilis Nutt.
Penstemon grandiflorus Nutt.
Penstemon pallidus Small
Penstemon tubiflorus Nutt.