Cuar. III. FUMARIACE. 123 
greatly curved in under 4 hrs. When the loop was 
removed, the petioles straightened themselves in about 
thesame time. The petiole (¢) was rather less sensitive ; 
and in another specimen, in which the corresponding 
Fig. 8. 
Corydalis claviculata. 
Leaf-tendril, of natural size. 
petiole bore rather larger leaflets, a loop of thread 
weighing one-eighth of a grain did not cause curvature 
until 18 hrs. had elapsed. Loops of thread weighing 
one-fourth of a grain, left suspended on the lower 
