PLANT: Perennial, submersed rhizomatous herbs with thin petiole-like branches (stolons) bearing 1 to several nodes. LEAVES: floating, suborbicular, 1 or 2 per node of stolon. INFLORESCENCE: umbels at leaf bearing nodes. FLOWERS: floating or elevated above the water; buds submerged; corolla rotate, deeply lobed, the lobes fringed and bearing a glandular appendage near the base; ovary ellipsoid, the apex tapering to the short style; stigma 2 lobed, persistent. FRUIT: a tardily dehiscent, submerged, capsule. SEEDS: smooth to papillate, the coat hard. REFERENCES: Mason, Charles T., Jr. 2001. Iridaceae. J. Ariz. – Nev. Acad. Sci. Volume 33(1).