Utah Beardstongue <i>(Penstemon utahensis)</i> (IMAGE)

Botanical Society of America

Utah Beardstongue <i>(Penstemon utahensis)</i>

Caption

Most <i>Penstemon</i> species that display the hummingbird pollination syndrome, such as <i>Penstemon utahensis</i> shown here, represent independent evolutionary origins of this phenotype.

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Photo credit: Carolyn A. Wessinger.

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