846 FLORA. 



* Scapes rooting in the mud; leaves entire; bladders usually few or none. 

 Scapes stout, strict, i-io- flowered; flowers yellow, 8-20 mm. broad. 



Flowers 16-20 mm. broad; spur 12 mm. long. j. U. cornuta. 



Flowers 8-10 mm. broad; spur 6 mm. long. 2. U.juncea. 



Scape filiform, 2-bracted above; flower solitary, purple. 3. U, resupinata. 



Scape filiform, the raceme zig-zag; flowers i-io, yellow. 4. U. subulata. 



Scape filiform; flowers minute, cleistogamous. 5. U. cleistogama* 



* Branches and finely divided leaves floating, or creeping on the mud, bladder- 

 bearing. 

 f Scape bearing a whorl of leaves with inflated petioles. 6. U. inflata. 



\ \ Scape leafless, or with a few minute scales. 



Leaves verticillate; corolla purple. 7. U. purpurea. 



Leaves crowded, 2-3-pinnately divided ; corolla yellow, large. 8. U. vulgaris. 



Leaves scattered, dichotomously divided. 



Cleistogamous flowers among the leaves. 9. U. clandcstina. 



No cleistogamous flowers. 



Bladders mainly or entirely on leafless branches. 



Leaf-segments linear, flat 10. U. intermedia. 



Leaf -segments capillary. n. U.fibrosa. 



Bladders among the leaves. 



Flowers 2-8; spur usually reduced to a short protuberance. 



12. U. minor. 

 Flowers 1-2; spur shorter than the lower lip, conic, gibbous. 



13. U.gibba. 

 Flowers 1-3; spur oblong, as long as the lower lip. 14. U. biflora. 



1. Utricularia cornuta Michx. HORNED BLADDER WORT. (I. F. f. 3342.) 

 Scape strict, 0.7-4 dm. high, with or without a few scattered scales, rooting in the 

 mud. Stems and branches root-like, sometimes with a few entire leaves and few 

 bladders, or several; flowers 1-6, yellow, fragrant; pedicels 2-4 mm. long; lower 

 lip of the corolla large, somewhat galeate, the sides strongly reflexed, with a promi- 

 nent palate which projects inwardly and is pubescent at the throat; upper lip 

 smaller, obovate; spur acute, curved; seeds black, rugosely pitted. On borders 

 of ponds, or in bogs, Newf. to Ont., Minn., Fla. and Tex. June-Aug. 



2. Utricularia juncea Vahl. RUSH BLADDERWORT. (I. F. f. 3343.) Scape 

 strict, 1.5-4 dm. high, rooting in the mud, bearing few or several minute scales. 

 Flowers 3-10, bright yellow; pedicels 2 mm. long, or less; lower lip of the corolla 

 obovate, pointed, mainly composed of the palate, the upper little smaller, obovate, 

 emarginate; spur linear-subulate, slightly curved, or straight. In bogs, Va. to 

 Fla. and Tex., mostly near the coast. Also in the W. Ind. and S. Am. July- Aug. 



3. Utricularia resupinata B. D. Greene. REVERSED BLADDERWORT. (I. F. f. 

 3344.) Scape 5-18 cm. high, 2-bracted near the flower, arising from creeping 

 rooting shoots which rise 2-5 cm. above the ground and bear a few branches and 

 bladders. Flower resting transversely upon the summit of the scape and so appear- 

 ing resupinate; corolla 6-10 mm. long, the limb deeply 2-parted, remote from the 

 conic spur. In sandy bogs and borders of ponds, Me. to Fla., west to Mich. 

 July-Aug. 



4. Utricularia subulata L. TINY OR ZIG-ZAG BLADDERWORT. (I. F. f. 

 3345-) Scape 2.5-20 cm. high, the racemes zig-zag. Leaves few, entire, they 

 and the bladders seldom found; pedicels 4-1 2 mm. long, slender; corolla 4-6 mm. 

 broad, the lower lip 3-lobed, the upper smaller, ovate ; spur conic, appressed to the 

 lower lip and equalling it in length, or shorter. In wet, sandy soil, Mass, to Fla., 

 west to Tex., Mex. and Ark. Also in Cuba. March-Aug. 



5. Utricularia cleistogama (A. Gray) Britton. CLOSED BLADDERWORT. 

 (I. F. f. 3346.) Scape hair-like, 2-8 cm. high, i-2-flowered. Stems root-like, 

 sparse, sending a few minute simple shoots above ground; bladders minute, seldom 

 seen; flowers on short bracted pedicels; corolla 1-2 mm. broad, strictly cleistoga- 

 mous, spurless, the lips nearly equal, the lower varying from purplish to yellow, 

 the upper white; seeds rugosely pitted; capsule globose. In wet soil, eastern 

 Mass, and in the pine-barrens of N. J. August. 



6. Utricularia inflata Walt. SWOLLEN BLADDERWORT. (I. F. f. 3347.) 

 Scapes stout, o. 7-5 dm. high, bearing a whorl of 5-9 leaves at about the middle. 

 Branches long, floating, crowded with dichotomously divided leaves and covered 



