Culver's root flowertop

The spiky flowertop of Culver's root, Veronicastrum virginicum, a kind of wild snapdragon native to North America.
 
For more about Culver's root and native plants for the Midwest, especially those that do well in shade/moist areas, see the "book" on this website, Gardening with Native Plants in Shady Evanston.

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