Terrestrial scapose herbs, with tufts of root-like bladder-bearing branches arising from near the base of the scape, and few extremely delicate leafy branches radiating horizontally from the same region, so inconspicuous and so readily detached from the scape that they are rarely seen. Leaves delicate, some linear, erect, and grass-like, others colorless and root-like, bladder-bearing. Bladders minute and rudimentary, beaked but without bristles. Inflorescence racemose or subspicate, sometimes reduced to a single flower; scales on the lower portion of the scape several, basally inserted; pedicels from the axils of basally inserted bracts, with an inner pair of opposite lateral bractlets. Calyx 2-parted, the lobes thin, veiny, appressed to and exceeding the mature capsule. Corolla 2-lipped, the lips nearly distinct, the upper narrow, erect, with a distinct claw, the lower with a prominent galeate palate, the edge of the aperture of the spur usually ciliate. Anthers vertically 2-lobed. Capsule many-seeded. Seeds very minute, subglobose or prismatic, reticulate or areolate. [Greek, hairy mouth, from the ciliate aperture of the spur in the type species.]

About 50 species, of wide geographic distribution. Type species: Utricularia cornuta Michx. Corolla much exceeding the calyx.

Lower lip of corolla 6"-8" long; spur 31/2"-6" long.

1. S. cornuta.

Lower lip of corolla i"s" long; spur 21/2"-4" long.

2. S. juncea.

Corolla shorter than or about equalling the calyx.

3. S. virgatula.

1. Stomoisia Cornuta (Michx.) Raf. Horned Bladderwort

Fig. 3873

Utricularia cornuta Michx. Fl. Bor. Am. 1: 12. 1803. Stomoisia cornuta Raf. Fl. Tellur. 4: 108. 1838.

Scape strict, brownish, 1 1/2'-12' high, 1-5-flowered, the flowers usually approximate near the summit, the scales several or numerous, rarely exceeding 1" in length, acute. Bracts 1/2"-1" long, acute; bractlets the same length, but narrower; pedicels rarely exceeding the bracts; calyx yellowish, the upper lobe acuminate, 2"-3" long, the lower acute, often much shorter; corolla yellow, the lower lip 6"-8" long, with a spreading margin around the galeate palate; spur subulate, pendent, 3V-6" long; capsule subglobose, 11/2"-2" in diameter, closely invested by the calyx-lobes and slightly beaked by the upper one.

On wet borders of ponds, or in bogs, Newfoundland to Minnesota, south to Florida and Texas. Also in the Bahamas and Cuba. July-Aug.

2. Stomoisia Juncea (Vahl.) Barnhart. Rush Bladderwort

Fig. 3874

Utricularia juncea Vahl, Enum. 1: 202. 1804. Utricularia personata LeConte; Ell. Bot. S. C. & Ga.

1: 23. 1816.

Scape strict, brownish, 4-16' high, 1-12-flow-ered, the flowers usually scattered along the upper part, the scales several or numerous, \"-\" long, acute. Bracts 3/4"-1" long, acute; bractlets the same length, but narrower; pedicels rarely exceeding the bracts; calyx yellowish, the upper lobe acuminate, 2"-21/2" long, the lower acute, much shorter; corolla yellow, the lower lip 4"-5" long, with little or no spreading margin; spur subulate, pendent, 2 1/2"-4" long; capsule subglobose, 1"-1 1/2" in diameter, closely invested by the calyx-lobes and slightly beaked by the upper one.

On wet borders of ponds, and in bogs, New York to Florida to Mississippi, chiefly near the coast. Also in the West Indies and South America. July-Aug.

2. Stomoisia Virgatula Barnhart. Fairy-Wand Bladderwort

Fig. 3875

Utricularia simplex C. Wright, in Sauvalle, Anal.

Acad. Habana 6: 315. 1870. Not R. Br. 1812. U. virgatula Barnh. Bull. Torr. Club 34: 580.

1908.

Scape wiry, strict, brownish, 1'-8' high, 1-6-flowered, the scales several, minute, acute. Bracts less than \" long, acute; bracts the same length, but narrower; pedicels shorter than the bracts; calyx purplish, the upper lobe acuminate, 2" long, the lower acute, much shorter; corolla yellow, the upper lip barely if at all exceeding the upper calyx-lobe, the lower of about the same length, with a minute tuft of hairs in the throat; spur conic, pendent, acute, 1"-1 1/2" long; capsule globose, 1" in diameter or less, closely invested by the calyx-lobes and beaked by the upper one.

On wet borders of ponds, New York, New Jersey, Florida and Mississippi. Also in Cuba. Rare and local. Sept.