442 UTRICULARIA NELUMBIFOLIA. CHAF. XVIIL 



species of certain closely allied genera, had the same 

 essential structure as those of Utricularia montana, and 

 whether they captured prey, I asked Prof. Oliver to send 

 me fragments from the herbarium at Kew. He kindly 

 selected some of the most distinct forms, having entire 

 leaves, and believed to inhabit marshy ground or 

 water. My son, Francis Darwin, examined them, and 

 has given me the following observations; but it 

 should be borne in mind that it is extremely difficult 

 to make out the structure of such minute and delicate 

 objects after they have been dried and pressed.* 



Utricularia nelunibifulia (Organ Mountains, Brazil). 

 The habitat of this species is remarkable. According 

 to its discoverer, Mr. Gardner,! it is aquatic, but " is 

 only to be found growing in the water which collects 

 in the bottom of the leaves of a large Tillandsia, that 

 inhabits abundantly an arid rocky part of the moun- 

 tain, at an elevation of about 5000 feet above the level 

 of the sea. Besides the ordinary method by seed, it 

 propagates itself by runners, which it throws out from 

 the base of the flower-stem ; this runner is always 

 found directing itself towards the nearest Tillandsia, 

 when it inserts its point into the water and gives 

 origin to a new plant, which in its turn sends out 

 another shoot. In this manner I have seen not less 

 than six plants united." The bladders resemble those 

 of Utricularia montana in all essential respects, even to 

 the presence of a few minute two-armed glands on the 

 valve. Within one bladder there was the remnant of 

 the abdomen of some larva or crustacean of large size, 



* Prof. Oliver has given (' Proc. but he does not appear to have 



Linn. Soc.' vol. iv. p. 169) figures paid particular attention to these 



of the bladders of two South organs. 



American species, namely, Utri- f 'Travels in the Interior of 



c, laria Jameconiana and peltata; Brazil, 183&-11,' p. 527 



