94 TENDRIL-BEARERS. Cuap. III. 
fully described under B. capreolata, I will here say 
nothing more about them. 
Bignonia exquinoctialis, var. Chamberlaynii.—The 
internodes, the elongated non-sensitive petioles, and 
the tendrils all revolve. The stem does not twine, 
but ascends a vertical stick in the same manner as 
the last species. The tendrils also resemble those of 
the last species, but are shorter; the three toes are 
more unequal in length, the two outer ones being 
about one-third shorter and rather thinner than the 
middle toe; but they vary in this respect. They 
terminate in small hard points; and what is important, 
cellular adhesive discs are not developed. The re- 
duced size of two of the toes as well as their lessened 
sensitiveness, seem to indicate a tendency to abortion ; 
and on one of my plants the first-formed tendrils were 
sometimes simple, that is, were not divided into three 
toes. We are thus naturally led to the three following 
species with undivided tendrils :— . 
Bignonia speciosa.—The young shoots revolve irregu- 
larly, making narrow ellipses, spires or circles, at rates 
varying from 3 hrs. 30 m. to 4 hrs. 40 m.; but they 
show no tendency to twine. Whilst the plant is 
young and does not require a support, tendrils are 
not developed. Those borne by a moderately young 
plant were five inches in length. They revolve spon- 
taneously, as do the short and non-sensitive petioles. 
When rubbed, they slowly bend to the rubbed side 
and subsequently straighten themselves ; but they are 
not highly sensitive. There is something strange in 
