Solidago capulinensis

Solidago capulinensis, known as the Capulin goldenrod is a rare plant endemic to Capulin Volcano National Monument and Las Animas County, Colorado and was first described and collected in 1936 by Theodore Dru Alison Cockerell and Darwin Maxson Andrews. The species was cultivated as an ornamental from the 1930's until the 1970's, but not found in the wild since the initial collection. As botanists only knew the plant from a single collected specimen, it was not included in any subsequent account of the New Mexico or United States flora. Academic interest in the species came after it was rediscovered lining a walkway at the Pueblo Colorado Nature Center in Pueblo, Colorado, which prompted a new survey within Capulin Volcano National Monument. Capulin goldenrod was subsequently found growing throughout the monument and re-identified as a rare endemic plant. It is the only known rare vascular plant species in the monument....read more on Wikipedia.