LENTIB ULARIA CEAE. 847 



with bladders; leaves of the scape finely dissected, their petioles cylindric, inflated, 

 dilated upward; flowers 2-10, yellow, about 2 cm. broad; upper lip of the corolla 

 broadly ovate, obscurely lobed or crenate, the lower 3-lobed; spur conic, emargi- 

 nate, appressed to the lower lip and about one-half its length; capsule nodding in 

 fruit. In ponds, Canada (according to Pursh); Me. to Fla. and Tex., near the 

 coast. March-Aug. 



7. Utricularia purpurea Walt. 1 PURPLE BLADDERWORT. (I. F. f. 3348.) 

 Scape 2.5-15 cm. high, i-4-flowered. Branches floating, long, with numerous 

 dichotomous capillary leaves in verticils of 4*5 and 5*3, and many large bladders; 

 corolla violet-purple, 6-16 mm. broad, the lower lip 3-lobed, the lateral lobes sac- 

 cate; upper lip truncate, emarginate; spur nearly conic, appressed to the lower 

 lip and one-half its length, or more. In ponds, Me. to Fla., near the coast; also in 

 Ind. May-Aug. 



8. Utricularia vulgaris L. GREATER BLADDERWORT. HOODED WATER- 

 MILFOIL. POP- WEED. (I. F. f. 3349.) Scapes stout, 0.7-3.5 dm, high- Leaves 

 2-3-pinnately divided, usually crowded, the segments setaceous; branches floating, 

 sometimes 3 dm. long, the leaves sometimes 12-14 mm. long, with numerous blad- 

 ders; flowers 3-20, racemose, yellow; pedicels 8-16 mm. long, recurved in fruit; 

 corolla 12 mm. broad or more, the sides of the lips reflexed; palate prominent; 

 upper lip nearly entire, the lower slightly 3-lobed and longer than the conic some- 

 what curved spur. In brooks and ponds, Newf. to Fla., Br. Col. and Cal. Also in 

 Europe, Asia, Cuba and Mex. June-Aug. 



9. Utricularia clandestina Nutt. HIDDEN-FRUITED BLADDERWORT. (I. F. f. 

 3350.) Scape slender, 5-13 cm. high, arising from long floating branches. Leaves 

 scattered, repeatedly forked, the divisions capillary, bearing numerous bladders. 

 Flowers of two kinds; those of the scape 3-5, complete, those among the leaves 

 cleistogamous, numerous, their pedicels reflexed in fruit; corolla of the upper com- 

 plete flowers yellow, spreading, 8-10 mm. broad when expanded, the lips nearly 

 equal in length, the lower broader and 3-lobed; spur shorter than the lower lip, 

 thick, obtuse, approximate to it. In shallow ponds, N. B. to N. J. July. 



10. Utricularia intermedia Hayne. FLAT-LEAVED BLADDERWORT. (I. F. f. 

 3351.) Scape capillary, 5-25 cm. high. Branches floating, 5-15 cm. long; leaves 

 6-12 mm. long, more or less scattered, 2-ranked, repeatedly dichotomous, the seg- 

 ments 0.25 mm. wide or less, the margins bristly-serrulate. Bladders, with rare 

 exceptions, borne on leafless branches; flowers 1-5, yellow; corolla 12 mm. broad, 

 its lower lip broad with a large palate and exceeding the upper; spur conic, sub- 

 acute, nearly as long as the lip, to which it is appressed. In shallow water, Cape 

 Breton to Br. Col., N. J., Minn, and Cal. Also in Europe. June-Aug. 



11. Utricularia fibrosa Walt. FIBROUS BLADDERWORT. (I. F. f. 3352.) 

 Scape slender, 0.7-3 dm. high- Leaves scattered, small or sometimes scarcely any, 

 bladders often on leafless branches, sometimes none; flowers 1-6, yellow; corolla 

 8-12 mm. broad, the lips nearly equal, broad, the upper undulate or 3-lobed, the 

 middle lobe striate; spur nearly linear, obtuse, ascending, nearly equalling or 

 sometimes exceeding the lower lip. In shallow ponds and swamps, L. I. to Fla. 

 and La. June-July. 



12. Utricularia minor L. LESSER BLADDERWORT. (I. F. f. 3353.) Scapes 

 slender. 0.5-1.8 dm. high. Branches floating, short; leaf- divisions few and seta- 

 ceous; bladders borne along the leaves, few, often none, the largest not over 2 mm. 

 long; flowers i-io, pale yellow, racemose; corolla 4-6 mm. broad, ringent, the 

 upper lip smaller than the lower; spur usually reduced to a blunt broad protuber- 

 ance, shorter than the lips; pedicels reflexed in fruit. In shallow ponds and in 

 bogs, Greenland and Lab. to Br. Col., N. J., Ark., Utah and Cal. Also in Europe. 

 June-July. 



13. Utricularia gribba L. HUMPED BLADDERWORT. (I. F. f. 3354.) Scapes 

 filiform, 2.5-13 cm. high, arising from sparingly leafy, floating or creeping 

 branches. Leaves root-like, in the mud or just above it, usually delicate, the divi- 

 sions often only I or 2, capillary; bladders few and minute, the largest about 

 I mm. long, or often none; flowers I or 2, yellow; corolla 6-8 mm. broad, its lips 

 rounded, broad, entire, or undulate, about equal; spur thick, conic, ascending, 

 gibbous at the base, obtuse, shorter than the lips. In shallow water, Oni. to Me., 

 Mich., Ala. and 111. July-Aug. 



