GAMOPETALyE 167 



is poured over a strainer with fresh leaves of Butter- 

 wort, until it is turned sour. This imparts to it a 

 compact, tenacious consistency. It acts also in pre- 

 venting cream being formed. If it curdles the milk 

 curds and whey is formed. 



PiNGUicuLA VULGARIS. — Gfowiug amougst moss, 

 the specimen depicted in Fig. 47 is an excellent example 

 of a rosette plant, with radical leaves, ovate, oblong, with 

 inr oiled margin. The solitary flower is home on a long 

 scape. 



Bladderwort (Utricularia vulgaris). 



Like the last, Bladderwort is also an insectivorous 

 plant. It is, however of the eel-trap type, possessing, 

 as the English and generic names imply, small 

 bladders, with a trapdoor like that of an eel-basket, 

 which serve to imprison water fleas and other small 

 fry of that type. 



Here, again, Darwin well describes their character, 

 and we cannot do better than cite his remarks as to 

 one of these plants. Speaking of the bladders he 

 says, ''They are supported on short footstalks. When 

 fully-grown they are one-tenth of an inch (2*54 mm.) 

 in length. They are translucent, of a green colour, 

 and the walls are formed of two layers of cells. The 

 exterior cells are polygonal and rather large, but at 

 many points where the angles meet there are smaller 

 rounded cells." 



Inside are processes which serve for absorption of 

 the dead insects, etc. The bladder is straight below, 



