312 A GUIDE TO THE WILD FLOWERS 



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der scaly stalks crowned by 1-5 yellow, irregular and spurred 

 flowers, that are about ^ in. long. In shallow still water. 

 New Brunswick to New Jersey. July. Fig. 956. Besides Nos. 

 957 and 959 there are several closely related species. See 

 also No. 803 and 804. 



957. Bladderwort. Utricularia gibba. (Lentibulariaceae.) 

 Resembling No. 956 in general aspect and habit, but the 

 flowers usually only i or 2, and not over 3^ in. long. In shal- 

 low still water. Ontario and Maine to Alabama and west- 

 ward. August. See also No. 803, 804, 956 and 959. 



958. Flowers purple or rose-pink. 



Flowers irregular and spurred; submerged leaves finely dis- 

 sected Purple Bladderwort no. 959 



Flowers not irregular or spurred 

 Flower solitary; leaf stalk attached to center of leaf blade 



Water-shield no. 960 



Flowers small, crowded in a finger-shaped cluster 



Water Persicaria no, 961 



959. Purple Bladderwort. Vesiculina purpurea. ( Utricularia 

 purpurea.) (Lentibulariaceae.) Resembling No. 956, but the 

 submerged leaves in clusters of 4's or 5's, the segments 

 thread like, and the flowers violet or reddish-purple. In 

 ponds, Maine to Florida, and in Indiana. July. See No. 956. 



960. Water-shield. Brasenia Schreberi. (Cabombaceae.) A 

 slender aquatic covered with a gelatinous film. Leaves float- 

 ing, oval, toothless, 2J4-4 in. long, the long stalk attached to 



