846 FLORA. 



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

 Scapes stout, strict, 1- 10- flowered; flowers yellow, 8-20 mm. broad. 



Flowers 16-20 mm. broad; spur 12 mm. long. 1. 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 1-10, yellow. 4. C. 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. infiata. 

 f t 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. clandestina. 



No cleistogamous flowers. 



Bladders mainly or entirely on leafless branches. 



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



Leaf-segments capillary. 11. 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. bifiora. 



1. Utricularia cornuta Michx. Horned Bladderwort. (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, rugoselv 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 4-12 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. t 

 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, 1-2-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 rugoselv pitted; capsule globose. In wet soil, easterr 

 M 1 . and in the pine-barrens of N. J. August 



6. Utricularia inflata Walt Swollen Bladderwort. (I. F. f. 3347. 



-tout. 0.7 5 dm. high, bearing a whorl of 5 9 leaves at about the middle 

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



