Sep erect, the outer oblong, the inner ovate; pet yellow, narrowly spatulate; glands confluent, forming a ring around the base of the stamens; ovary subcylindric, with 1 ovule per locule; style elongate; fr indehiscent, corky, conic-obovoid, flattened, truncate, tipped with the stout 4-angled style, enclosing the single seed in the center near the base, bearing on each side distally an inflated hollow appendage; herbs with sessile, clasping lvs and elongate racemes. Monospecific.
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.