BUTTERWORT FAMILY 



375 



of the water to open. The Butterworts are small, terrestrial plants 

 with rosettes of radical leaves with inrolled margins, and viscid, 

 glandular surfaces which capture small flies. Their solitary purple 

 flowers have some resemblance to violets. " Pinguicula vulgaris 

 (Common Butterwort) has 

 the property of giving con- 

 sistence to milk and of 

 preventing it separating 

 into either whey or cream. 

 Linnteus says that the solid 

 milk of the Laplanders is 

 prepared by pouring it, 

 warm from the cow, over a 

 strainer on which fresh 

 leaves of Pinguicula have 

 been laid. The milk, after 

 passing among them, is left 

 for a day or two to stand, 

 until it begins to turn sour ; 

 it throws up no cream, but 

 becomes compact and 

 tenacious, and most de- 

 licious in taste. It is not 

 necessary that fresh leaves 

 should be used after the 

 milk is once turned ; on 

 the contrary, a small por- 

 tion of this solid milk will 

 act upon that which is 

 fresh, in the manner of 

 yeast." — (Lindley.) 



i. UtriculAria. — Sub- 

 merged, aquatic plants with 

 much divided leaves bear- 

 ing bladders ; calyx of two 

 equal sepals ; corolla per- 

 sonate. 



2. Pinguicula. Ter- 

 restrial plants with radical 

 2-lipped, upper lip 3-cleft, lower 2-cleft ; corolla gaping. 



1. Utricularia (Bladderwort).— Submerged, rootless, aquatic 

 plants with floating, much divided leaves, with thread-like 

 segments, bearing small bladders; flowers few, in a raceme, 



utriculAria vulgXris (Common Bladderwort). 



leaves and solitary flowers; calyx * 



