Cuap. IL CLEMATIS. 47 
footstalk caused it, in 12 hrs. to bend greatly, and 
ultimately to such an extent that the leaf passed to 
the opposite side of the stem; the forked stick having 
been removed, the leaf slowly recovered its former 
position. P 
The young leaves spontaneously and gradually change 
their position: when first developed the petioles are 
upturned and parallel to the stem; they then slowly 
bend downwards, remaining for a short time at right 
Fig. 1. 
Clematis glandulosa. 
With two young leaves clasping two twigs, with the clasping portions thickened. 
angles to the stem, and then become so much arched 
downwards that the blade of the leaf points to the 
ground with its tip curled inwards, so that the whole 
petiole and leaf together form a hook. They are thus 
enabled to catch hold of any twig with which they 
may be brought into contact by the revolving move- 
ment of the internodes. If this does not happen, they 
retain their hooked shape for a considerable time, and 
then bending upwards reassume their original upturned 
