Onar. XTIL STRUCTURE OF THE LEAVES. 287 
The two lobes stand at rather less than a right angle 
to each other. Three minute pointed processes or 
filaments, placed triangularly, project from the upper 
surfaces of both; but I have seen two leaves with four 
- filaments on each side, and another with only two. 
These filaments are remarkable from their extreme 
sensitiveness to a touch, as shown not by their own 
movement, but by that of the lobes. The margins of 
the leaf are prolonged into sharp rigid projections 
which I will call spikes, into each of which a bundle 
Fia, 12. 
(Dionea muscipula.’ 
Leaf viewed laterally injts expanded state. 
of spiral vessels enters. The spikes stand ‘in such 
a position that, when the lobes close, they inter-lock 
like the teeth of a rat-trap. The midrib of the 
leaf, on the lower side, is strongly developed and 
prominent. 
The upper surface of the leaf is thickly covered, 
excepting towards the margins, with minute glands of 
a reddish or purplish colour, the rest of the leaf being 
green. There are no glands on the spikes, or on the 
foliaceous footstalk. The glands are formed of from 
