106 
leaves. While the normal leaf is tri-foliolate , the abnormal ones 
go through all stages of reduction, two of which are illustra- 
ted by figg. 20° and »- 
Another instance of suppression of leaves, of aphylly, as 
Masters rather strongly puts it '), was shown by a species of 
Calliandra (fam. Mimoseae). Fig. 21° represents a normal leaf: 
it consists of two leaflets, which themselves are composed ot 
a number of pairs without a terminal leaflet. Of the many 
deviations shown by these leaves, I give two only, both lacked 
complete differentiation, as is evident from figg. 21> and 21¢?). 
Bignonia argyreia violacea (fam. Bignoniaceae). The climbing 
branches of this plant have tri-foliolate leaves in which the 
terminal leaflet has been replaced by a tendril. This tendril is 
divided into three very sharp slightly curved points resembling 
birds’ claws; at the base of the branches and on small twigs 
are regularly produced simple leaves, a good deal larger, of 
beautiful colour and oval or elliptical acuminate shape. Amongst 
the latter leaves Mr. Smith found various aberrations, for in- 
stance: bi-foliolate leaves without a tendril, more or less re- 
gular pinnatifid and pinnatipartite leaves and so on. In the 
arrangement no regular progression towards perfection is to 
be observed; thus on one bough the two leaves of the first 
whorl were bi-foliolate without a tendril, those of the second, 
both of them simple; on the third whorl one bifid, the other 
one trifid, on another bough one of the leaves of a pair was 
binate, the other one trifid, of the next pair both leaves 
simple, after which followed the climbing leaves above de- 
seribed, 
Bignonia venusta. Leaves 2—38 foliolate, with a long, three- 
branched winding tendril, when produced by climbing bran- 
ches. In this plant Mr. Smith found transitional stages between 
1) 1. c, ‘p. 452. 
2) On the other hand another member of this family, a native of South-America, 
and growing wild in Java, viz. Mimosa pudica farnisl inst f hypertrophy 
the not unfrequent occurrence of three paired leaves between the normal two- 
paired ones. 
