Much like Physalis, but the cal shallowly lobed, accrescent but not inflated, at maturity largely enclosing the berry but open at the end; cor wide open, nearly rotate, white or whitish; fls often more than 1 per node. 3, Asian, 2 N. Amer.
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.