WILD FLOWERS OF NEW YORK 257 



Bracts, and scales if present, flat, usually attached, plants aquatic; flowers yellow 



(genus Utricularia Linnaeus) 

 Scape 2 inches long or less with a whorl of more or less united conspicuous 



floats ; corolla one-half to two-thirds of an inch long 



Utricularia radiata 

 Scapes without floats 



Stems free-floating, except for a single point of attachment 



Scape two to five-flowered, without scales, cleistogamous flowers 



also present Utricularia geminiscapa 



Scape six to twenty-flowered, with one to five scales; cleistogamous 



flowers none Utricularia macrorhiza 



Stems creeping on the bottom in shallow water; some or all of the leaves 

 rootlike 



Spur a mere sac; palate obsolete; pedicels recurved in fruit 



Utricularia minor 

 Spur and palate conspicuous; pedicels ascending in fruit 



Segements of some leaves linear, flat, bristly-serrulate; upper 

 lip of corolla about one-half the length of the lower lip . . 



Utricularia intermedia 



Segments of leaves all capillary; lips of corolla nearly equal in 

 length 



Spur stout, conic, shorter than the lower lip 



Utricularia gibba 



Spur slender, equaling or exceeding the lower lip 

 Spur tapering from base to apex; leaves all alike; bladder- 

 bearing ; scapes 2 to 5 inches high .... 



Utricularia pumila 



Spur conic at the base, linear above; leaves not all bladder- 

 bearing; scape 4 to 1 6 inches high. . 



Utricularia fibres a 



Flat-leaved Bladderwort 



Utricularia intermedia Hayne 



Plate 206b 



Stems aquatic, rooted in shallow water, the horizontally submerged 

 branches radiating from the base of the scape. Leaves alternate , one-fourth 

 to two-thirds of an inch long, three-forked at the base, the divisions again 



