Chap. IIL BIGNONIACE^. 97 



last in the structure and movements of its tendrils. I 

 also casually examined a fine growing plant of the 

 allied B. Lindleyi, and this apparently behaved in all 

 respects in the same manner. 



Bignonia capreolata. We now come to a species 

 having tendrils of a different type ; but first for the 

 internodes. A young shoot made three large revolu- 

 tions, following the sun, at an average rate of 2 hrs. 23 m. 

 The stem is thin and flexible, and I have seen one 

 make four regular spiral turns round a thin upright 

 stick, ascending of course from right to left, and 

 therefore in a reversed direction compared with the 

 before described species. Afterwards, from the inter- 

 ference of the tendrils, it ascended either straight up 

 the stick or in an irregular spire. The tendrils are 

 in some respects highly remarkable. In a young 

 plant they were about 2J inches in length and much 

 branched, the five chief branches apparently repre- 

 senting two pairs of leaflets and a terminal one. Each 

 branch is, however, bifid or more commonly trifid towards 

 the extremity, with the points blunt yet distinctly 

 hooked. A tendril bends to any side which is lightly 

 rubbed, and subsequently becomes straight again ; 

 but a loop of thread weighing ^th of a grain produced 

 no effect. On two occasions the terminal branches 

 became slightly curved in 10 m. after they had touched 

 a stick ; and in 30 m. the tips were curled quite round 

 it. The basal part is less sensitive. The tendrils re- 

 volved in an apparently capricious manner, sometimes 

 very slightly or not at all ; at other times they 



