This is widespread in eastrern states on damp acid sandy soils, but rare to absent in much of the central Mississippi and Ohio Valleys (K). In Ky. most records are clustered in or near streamheads of the southern Cliff Section, where there is probably a history of open grassy conditions. {Records from CALD in SERNEC have been based on mislabelled E.W. Chester #4182 from CALL.]