WILD FLOWERS OF NEW YORK 257 



Bracts, and scales if present, flat, usually attached. ])lanls 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 lea\-es 

 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 lea\-es all capillar}^ ; lips of corolla nearly equal in 

 length 



Spur stout, conic, shorter than the lower lip 



Utricularia g i b b a 

 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 puraila 

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

 bearing; scape 4 to 16 inches high 



Utricularia filsrosa 



Flat-leaved Bladderwort 



Utricularia iiitcniicdia Hayne 



Plate 206b 



Stems aquatic, rooted in shallow water, the horizontally stibmerged 

 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 



