Utricularia. LENTIBULARIACEiE. 315 



U. inflata,"Walt. Inflated petioles of the whorled leaves oblong or clavate, tapering to 

 each end, the bases of the lower divisions also inflated; setaceous divisions pinnateiy 

 multifid : scape 3-10-flowered, a span or so long : pedicels recurved after flowering : flow- 

 ers rather large, yellow : spur conical-lanceolate, emarginate, appressed to and half the 

 length of the lower lip : capsule apiculate with a short distinct style : seeds globular, 

 squamose-echinate. — Car. 64 ; Ell. Sk. i. 20; A.DC. Prodr. viiL 4 ; Gray, Man. ed. 6, 318. 

 U. ceratophylla, Michx. Fl. i. 12 ; LeConte in Ann. Lye. N. Y. i. 73, t. 6, fig. 1. — Floating 

 in still water, Maine to Texas along the coast. 



§ 2. Scape leafless, emersed from submersed or floating leafy stems, which are 

 free swimming and mostly rootless in deep water, or in some sparingly rooting 

 where the water is shallow : leaves dissected into capillary or filiform divisions, 

 some or many of them (as also stems) bearing small bladders : chiefly perennial, 

 or continued by hybernacular tuber-like buds set free in autumn. 



* Cleistogamous flowers along the submersed copiously bladder-bearing stems. 

 U. clandestina, Nutt. Leaves of the slender stems repeatedly forked : scapes slender, 

 3 to 5 inches high, 3-5-flowered: corolla yellow, 3 lines long; lips nearly eq\ial in length, 

 the lower broader, somewhat surpassing the approximate thick and obtuse spur : cleisto- 

 gamous flowers, scattered on the leafy stems; their short peduncle soon deflexed : seeds 

 (from the clandestine blossoms) depressed-globular; the coat minutely reticulated. — Herb. 

 Greene, & in Gray, Man. ed. 1 (1848), 287. U. striata, Tuckerm. in Am. Jour. Sci. xlv. 29, 

 not of LeConte. U. geminiscapa, Benjamin in Linn. xx. 305 ? But that may be a form 

 of U. intermedia. — Ponds, from New Brunswick and New England to New Jersey, near the 

 coast. 



* * No cleistogamous flowers. 

 -1— Pedicels (few or several) recurved in fruit: corolla j'ellow. 

 U. vulgaris, L. Stems long and rather stout, densely leafy : leaves 2-3-pinnately 

 divided, very bladdery : bladders about 2 lines long : scapes a foot or less long, 5-16-flow- 

 ered: corolla (half inch or more broad) with sides of lips reflexed ; upper nearly entire, 

 hardly longer than the prominent palate : spur conical, porrect toward the slightly 3-lobed 

 lower Up, shorter than it, in the N. American plant (var. Americana) commonly narrower 

 and less obtuse than in the European. — Lam. 111. t. 14 ; Engl. Bot. t. 253; Fl. Dan. 

 t. 138 ; Gray, Man. 1. c. U. macrorhiza, LeConte, 1. c. — Slow streams, &c., Newfoundland 

 and Saskatchewan to Texas, and west to California and Brit. Columbia. (N. Asia, Eu.) 

 U. minor, L. Leaves scattered on the filiform stems, repeatedly dichotomous, smaU, se- 

 taceous : bladders barely a line long : scapes slender, 3 to 7 inches high, 2-8-flowered : 

 corolla pale yellow, 2 or 3 lines broad, ringent ; upper lip not longer than the depressed 

 palate of the lower : spur very short and obtuse. — Fl. Dan. t. 128 ; Engl. Bot. t. 254 ; 

 A.DC. 1. c. U. setacea, Hook. Fl. ii. 118, ex char. — Shallow still waters, Canada and 

 Saskatchewan to New Jersey, mountains of Utah and Nevada, northern Sierra Nevada, 

 and Brit. Columbia. (Eu., Siberia.) 



•<— -i— Pedicels erect in fruit, few and slender: corolla yellow. 

 ++ Spur of corolla thick and conical, shorter than the lower lip and approximate to it. 

 U. gibba, Li. Branches delicate, root-like : leaves sparse, sparingly dissected, capillary, 

 sparingly bladder-bearing: scape filiform, 1^ to 3 inches high, 1-2-flowered: corolla 3 

 lines broad ; tlie lips broad and rounded. — Spec. i. 18 (Gronov. Fl. Virg.) ; Pursh, Fl. i. 116. 

 U. pumila, Walt. Car. 64? Benjamin in Linn. xx. 313. U.' fomicata, LeConte, 1. c. U. 

 minor, Torr. Fl. N. Y. ii. 21, not L. — Shallow water, Massachusetts to Alabama and 

 Illinois. Apparently in a subalpine pond in Colorado, Greene. 

 U. bipartita, Ell. Sk. i. 22, from St. John's, S. Carolina, said to have "spur scarcely 

 half as long as the corolla, very obtuse," and " lower lip of the calyx generally 2-cleft, 

 sometimes divided to its base " (an anomalous character), has not been identified. 

 •H- +-1- Spur of corolla narrower, equalling or little shorter than the lower lip. 

 = Scapes 2 to 4 inches high, 1-3-flowered : corolla less than half an inch broad. 

 U. biflora, Lam. Floating or submersed stems filiform, small : dichotomously dissected 

 leaves delicately capillary, usually copiously bladder-bearing: spur narrowly oblong. 



