This section is from the book "An Illustrated Flora Of The Northern United States, Canada And The British Possessions Vol3", 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..
Herbs, with horizontal usually submerged leafy stems. Leaves alternate, 3-parted from the very base, the middle lobe erect and linear, the lateral lobes capillary and root-like, bladder-bearing; bladders slightly beaked, but without bristles. Inflorescence strictly 1-flowered, the pedicel continuous with the scape, its point of origin marked by the solitary bract, appearing like a scale above the middle of the scape; true scales none; bract basally inserted, amplexi-caul and tubular, the free margin truncate, more or less deeply 2-notched, without bractlets. Calyx 2-parted, the lobes concave, herbaceous, appressed to the mature capsule. Corolla very strongly 2-lipped, the palate a mere convexity at the base of the lower lip. Anthers not lobed. Capsule many-seeded. [Latin, a couch, from the transverse position of the corolla.]
Two species, the following, and another, in tropical South America. Type species: Utricularia resupinata B. D. Greene.
Utricularia resupinata B. D. Greene; Bigel. Fl.
Bost. Ed. 3, 10. 1840. Utricularia Greenei Oakes, Hovey's Mag. Hort. 7:
Scape and pedicel slender, 1-4' high, becoming much elongated, 4'-6' high in fruit, the bract i"-1" long. Flower half-reversed so as to rest transversely upon the summit of the pedicel; calyx-lobes subequal, about 1" long; corolla purple, 4"-6" long, the upper lip narrowly oblong-spatulate, the lower spreading, entire; spur conic-cylindric, obtuse, the tip distant from the lower lip and bent upward; capsule globose, 1 1/2'-2" in diameter.
Margins of ponds and lakes, New Brunswick to western Ontario and Pennsylvania, and South Carolina to Florida. Rare and local. July-Aug.