The mountain bluet flower (centaurea montana) is an erect, stoloniferous, clump-forming perennial which features solitary, fringed, rich blue cornflowers (2" diameter) with reddish blue centers and black-edged involucre bracts.
Centaurea montana grows in gardens where it grows best in sunny locations. It tolerates some light shade. If the plant is dug up a new plant can eventually regenerate from small pieces of root left in the soil.
This plant is inedible; however, it is a popular medicinal plant in Central Europe. Leaves of the plant are readily eaten by squirrels.
Photo captured May 22, 2010 at Chicago Botanic Gardens.
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