64 PREDATORY PLANTS. [CHAP. 
flower. It is frequent in boggy ground, but confined 
to the north. The greasy substance, or “oilous 
juice,” as old Gerarde called it, is secreted by glan- 
dular hairs, with which the leaf is studded. The 
leaf itself is irritable, and the edges become incurved 
over any nitrogenous substance placed upon it. It 
is not entirely carnivorous, as some seeds and pollen 
grains are also dissolved by the increased secretions 
consequent upon irritation. This fluid is acid, and 
similar to that secreted by Drosera, and after dis- 
solving its food it is again absorbed by the glands, 
together with the foreign substance it has dis- 
solved. 
Another new insectivorous plant is the Bladder- 
wort (Utricularia), of which we have three native 
species, They are aquatic, and delight in the foulest 
ditches, The plant is submerged, and the leaves 
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