62 



MEMOIRS OF THE NEW YORK BOTANICAL GARDEN 



16. Vesiculina Raf. Fl. Tcllur. 4: 109. 1838. Herbae aquati- 

 cae, caulibus submersis, verticillate ramosis, ramis verticillate vel 

 opposite decompositis. Folia vera nulla. Ascidia terminalia 

 ad ramulos, ore nuda vel cum solitaria media pubescente 

 proboscide. Scapus esquamatus, bracteatus, 1-4-florus; brac- 

 teae basifixae vel simulate basisolutae; bracteolae nullae. Calyx 



25. Vesiculina subgcn. Pemphigina. V. purpurea (Walt.) Rtif. a. Plant, half 

 natural size. b. Corolla, X 2. c. Bladder, X 8. 



2-partitus; lobi concavi, herbacei. Corolla cyanica, valde 2- 

 labiata; labium superius non lobatum, inferius 3-lobatum, lobis 

 lateralibus saccatis et palatum prominentem 2-lobatum formanti- 

 bus, lobo medio piano, inconspicuo. Antherae subglobosae. 

 Capsula globosa. Semina tuberculata. 



Species typica, Vesiculina purpurea (Walt.) Raf. {Vesiculina 

 saccata Raf. ; Utricularia saccata Le Conte; U. purpurea Walt.). 



Superficially bearing a close resemblance to Utricularia, this 

 group of species is really very distinct. The verticillate branches, 

 terminal Ijladders, and prominent palate in\ohing both lateral 

 lobes of the lower \\\:> of the corolla, arr i)eculiarities not found 

 elsewhere in the family. Two subgenera ma\' be recognized, as 

 follows: 



