barnhart: genera in lentibulariaceae 41 



one- flowered (except in the rare cases of forking) and are truly 

 simple, being quite devoid of bracts; while in the other genera 

 the compound nature of the scape is always indicated by the pres- 

 ence of at least one bract, even when there is only a single flower. 



The species of Pinguicula are remarkably uniform in habit. 

 Four very distinct types of corolla are to be found, and their 

 recognition furnishes an unquestionably natural method for the 

 arrangement of the species; for the present, however, even the 

 iconoclastic treatment here adopted leaves the genus Pinguicula 

 undisturbed. 



The genus Genlisea differs from Utricularia as commonly 

 accepted in having the calyx 5-lobed instead of 2-lobed. Each 

 plant bears leaves of three kinds: ordinary foliage-leaves, root- 

 like subterranean ones, and ascidia of a peculiar type entirely 

 different from any of the bladders found in other genera. 



Polypompholyx is the name that has been most commonly 

 applied to a small Australian genus characterized by four calyx- 

 lobes. Two of these are antero-posterior, and are undoubtedly 

 true calyx-lobes; the two others are lateral and internal, and 

 more or less petaloid, and should perhaps be regarded morpho- 

 logically rather as specialized appendages of the calyx than as 

 true lobes. The genus is here called Cosmiza, a prior name applied 

 by Rafinesque to one of its species, although he knew nothing of 

 the peculiar calyx which furnishes the most distinctive generic 

 character. 



The genus Biovularia is based upon a minute plant collected 

 many years ago in Cuba by Charles Wright, and is characterized 

 by two ovules, only one maturing, instead of the usually numerous 

 ovules and seeds of other Lentibulariaceae. It is an instance, 

 it is true, of extreme reduction, and may well be recognized as a 

 valid genus; but its relationship is extremely close with certain 

 species of the genus Utricularia as here restricted, and it is far 

 less entitled to recognition than any of the other segregates here 

 distinguished. 



After excluding Pinguicula, Genlisea, Cosmiza, and Biovularia, 

 there is left in the family a vast assemblage of heterogeneous 

 elements hitherto retained in a single genus, Utricularia, which 

 it is here proposed to dismember. The collective genus may be 

 distinguished from the others by the combination of the following 



