Cua. II. BIGNONIACES. 103 
North America where this species of Bignonia grows. 
Finally, I may remark how singular a fact it is that 
a leaf should be metamorphosed into a branched 
organ which turns from the light, and which can 
by its extremities either crawl like roots into crevices, 
or seize hold of minute projecting points, these ex- 
tremities afterwards forming cellular outgrowths which 
secrete an adhesive cement, and then envelop by their 
continued growth the finest fibres. 
Eccremocarpus scaber (Bignoniacex).—Plants, though 
growing pretty well in my green-house, showed no 
spontaneous movements in their shoots or tendrils; 
but when removed to the hot-house, the young inter- 
nodes revolved at rates varying from 3 hrs. 15 m. to 
1 hr. 13m. One large circle was swept at this latter 
unusually quick rate; but generally the circles or 
ellipses were small, and sometimes the course pursued 
was quite irregular. An internode, after making several 
revolutions, sometimes stood still for 12 hrs. or 18 hrs., 
and then recommenced revolving. Suchstrongly marked 
interruptions in the movements of the internodes I 
have observed in hardly any other plant. 
The leaves bear four leaflets, themselves subdivided, 
and terminate in much-branched tendrils. The 
main petiole of the leaf, whilst young, moves sponta- 
neously, and follows nearly the same irregular course 
and at about the same rate as the internodes. The 
movement to and from the stem is the most con- 
spicuous, and I have seen the chord of a curved petiole 
which formed an angle of 59° with the stem, in an 
