This largely northeastern diploid (2n = 16) has often been treated as S. roseus Michx. Typical lanceolatus includes S. roseus var. perspectus Fassett, and in Ky. it is known only from high elevation on Black Mt. Reports from Ky. of the southern Appalachian S. roseus var. roseus and the upper midwestern var. longipes (Fern.) Fassett appear to be erroneous (M).