Sep 5, imbricate, often unequal; cor funnelform to campanulate or salverform, the margin entire, angled, or shallowly lobed; ovary 1-3-locular, with 2 ovules per locule, or sometimes 4-locellar by the development of partitions between the ovules; style 1, elongate; stigma entire or 2-3-lobed; capsule 2-4-valved; ours twining herbs with broad, cordate or lobed lvs and handsome fls produced singly or few together at the summit of axillary peduncles. 600+, cosmop. (Pharbitis, Quamoclit)
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.