Heuchera villosa

This plant occurs broadly across the eastern US, mostly across the same range as the Heuchera parviflora complex (from the Ozarks to the Blue Ridge), with disjunct occurrences in New York.

H. villosa var. villosa

This is the typical plant of the Blue Ridge; it is very common at the higher elevations and can even be found occasionally on artificial stone work. It has acute lobes. these photos are from the Blue Ridge Parkway in middle NC.

H. villosa "var. macrorhiza"

This plant is occasionally recognized; it appears to be calciphile (sometimes H. longiflora is an associate) and the leaf lobes are less acute. It occurs at lower elevations across the Cumberland and Interior Plateau. The first picture is from southern Ohio, and the second is from eastern Kentucky not far from Cumberland Gap.

H. villosa var. arkansana

This highly distinctive plant occurs rather rarely in the Ozarks, mostly in the southern portion, and also in the Boston Mountains. It has thinner viscid leaves that resemble H. parviflora, and the inflorescences are cylindric and more condensed. The flowers are larger.