Solanum tuberosum L.
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.
Species Description - With stalked, ovate lfls irregularly alternating with much smaller sessile ones, and with broader cor-lobes, is occasionally found on rubbish-heaps and in waste places, but seldom survives the winter.