Heuchera richardsonii var. grayana or Prairie Alumroot, is native to the Midwest; found in Illinois, Missouri and the adjacent states. It is a variety of the species that was described and named in 1933 in honor of Dr. Asa Gray, who first discovered the variant. It differs in a few small measurable ways from the species, and is currently considered to be the same as the species. The flowers are a bit smaller, more pubescent and petals are, in addition to being glandular, are also minutely papillose. The stamens longer and the capsules more exserted. Its usual habitat is prairies and savanna woodlands, and in all other ways resembles Heuchera richardsonii. It is attractive to butterflies and other pollinators and resistant to deer.