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This species has reasonably attractive flowers, and it should be cultivated in wildflower gardens more often. Long-Sepal Penstemon resembles Penstemon digitalis (Foxglove Penstemon) somewhat, but it is usually a little smaller and has light violet or purple flowers, while Foxglove Penstemon has white flowers that are at most tinged with violet. Long-Sepal Penstemon also has longer sepals. Another native penstemon, Penstemon hirsutus (Hairy Penstemon), also has pinkish flowers, but the corolla of its flowers is more constricted at the mouth and its stems are more hairy. Other features to consider while identifying a penstemon species include the presence or absence of ridges on the lower inner surface of the corolla, the presence or absence of hairs on the leaves, and whether or not the lower lip of the corolla extends further forward than the upper lip. Return

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© John Hilty

Source: Illinois Wildflowers

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