This variety seems distinct from typical plants, and perhaps concentrated in the central Ohio Valley (but see Y). According to F its fruits are more broadly oblong to narrowly ovate, glabrous or minutely pubescent (versus glabrous), 4.5-6.5 x 2-2.5 mm (versus 6-10 x 1.5-2 mm), not contracted at summit; and it is often earlier flowering. Further research is needed to clarify its status.