This section is from the book "An Illustrated Flora Of The Northern United States, Canada And The British Possessions Vol2", by Nathaniel Lord Britton, Addison Brown. Also available from Amazon: An Illustrated Flora of the Northern United States, Canada and the British Possessions. 3 Volume Set..
Woody climbing vines, with opposite petioled leaves, and terminal corymbose perfect flowers. Stipules none. Calyx-tube top-shaped, adnate to the ovary, its limb 7-10-toothed.
Petals 7-10, narrow. Stamens 20-30, inserted on the disk; filaments subulate. Ovary 5-10-celled, 10-15-ribbed, its apex conic; style thick; stigma capitate, 5-10-lobed; ovules ∞. Capsule fragile, ribbed, opening between the ribs. Seeds numerous, the testa membranous, reticulated, produced into a club-shaped appendage. [Latin, decern, ten; the parts being often in 10's.]
A monotypic genus of southeastern North America.
D. barbara L. Sp. Pl. Ed. 2, 1663. 1763.
Glabrous, or the shoots pubescent, climbing by aerial rootlets to a height of several feet. Petioles \'-\' long; leaves ovate, acute or obtuse at the apex, rounded or narrowed at the base 2'-4' long, entire or repand-denticulate, sometimes pubescent on the veins of the lower surface, glabrous and shining above; corymbs terminal, compound, 2'-3' broad; flowers white, fragrant, 3"-4" broad; calyx-teeth deciduous; capsule top-shaped, 2"-3" high, tipped with the conic persistent style, opening between the ribs and remaining on the plant after the seeds fall away.