LENTIBULARrACEAE (BLADDER WORT FAMILY) 737 



scapes slender, 1 dm. high ; lips of the yellow corolla nearl}^ equal in length, 

 the lower broader and o-lobed, somewhat longer than the approximate thick 

 and blunt spur. — Ponds, N. B. to Del. and Pa., chiefly near the coast. July, 



Aug. 



Fig. 895. 



3. 

 3-10 dm. 



896. U. xu]g. V. amer. 



897. 



minor. 



t- -*- jVo cleistogamous flowers. 



++ Pedicels recurved in fruit; corolla yelloxo. 



U. vulgaris L. (Greater B.) Immersed stems 

 ng, crowded with l-A^-pinnately many-parted 

 capillary leaves hearing many bladders; scapes 5-12- 

 flowered, 1-3 dm. long ; corolla closed, 1-2 cm. broad, 

 the sides reflexed ; spur conical, rather shorter than the 

 lower lip, thick and blunt. — Eurasia; n. w. Am 

 Represented with us by 



Var. americana Gray. Spur more slender and rather acute. — Common in 

 ponds and slow streams, !Nfd. to Minn., s. to Va. and Tex., and 

 "westw. June-Aug. Fig. 896. 



4. U. minor L. (Smaller B.) Leaves scattered on the thread- 

 like immersed stems, 2—4 times forked, short; scapes weak, 2-8- 

 floWered, 0.5-2 dm. high ; upper lip of the gaping corolla not 

 longer than the depressed palate ; spur very short and blunt, or 

 almost none. — Shallow water, e. Que. to B. C, s. to N. J., w. 

 N. Y., Great L. region, Utah, and Cal. May-July. (Eu.) Fig. 

 897. 



++ ++ Pedicels erect in fruit, few and slender ; corolla yellow. 



5. U. gibba L. Scap)e 2.5-10 cm. high, 1-2-floicered, at base 

 furnished with very slender short branches, bearing sparingly dis- 

 sected capillary root^-like leaves and scattered bladders ; corolla 

 6-8 mm. broad, the lips broad and rounded, nearly equal ; the 

 lower lip witli tlie sides reflexed, exceeding and approximate to the 

 very thick and blunt conical gibbous spur. — Shallow water. Me. 

 to Fla. and Ala., near the coast ; and from w. Vt. to Ont., 111., and 

 "Minn." July-Sept. Fig. 898. 



6. U. biflbra Lam. Scape 0.5-1.3 dm. high, 1-^flowered, at the base bearing 

 somewhat elongated submersed branches with capillary root-like leaves and 

 numerous bladders ; corolla 8-13 mm. broad, the spur 

 oblong, equaling the lower lip ; seeds scale-shaped. — • 

 Ponds and shallow waters, ]Mass. to Fla.; and from 

 Wise, and Minn, to Ala. and Tex. Aug., Sept. Fig. 

 899. 



7. U. fibrosa Walt. Leaves crowded or whorled on 

 the small immersed stems, several times forked, capil- 

 lary ; tiie bladders borne mainl}" along the stems ; flowers 

 2-6, 1-1.3 cm. broad ; lips nearly equal, broad and ex- 

 panded, the upper undulate, concave, plaited-striate in 

 the middle ; spur nearly linear, obtuse, approaching and 

 almost equaling the lower lip. — Shallow pools in pine 

 barrens, L. I. and X. J. to Fla. and Ala. May-July. 



8. U. intermedia Hayne. Leaves crowded on the im- 

 mei-sed stems, 'I-ranked, 4-5 times forked, rigid, the divi- 

 sions linear-awl -shaped, minutely bristle-toothed along the 

 margins ; the bladders borne on separate leafless branches; 

 upper lip of corolla much longer than the palate ; spur 

 conical-subulate, acute, appressed to and nearly as long as 

 the very broad (1-1.5 cm.) lower lip. — Shallow pools and 

 streams, Nfd. to B. C, s. to N. J., Pa., Great L. region, 

 la., and Cal. IS Lav-July. (Eurasia.) Fig. 900. 



J 



898. U. 



gibba. 



U. biflora. 



900. U. Intermedia. 



•M- 4-4. ■*-*. Pedicels erect in fruit, rather long ; corolla violet-purple. 

 9. U. purpurea Walt. Leaves whorled along the long immersed free-floating 



GRAY S MANUAL 



47 



