156 



Clianthus Binnendijhianus Kurz. 

 Habitat Ceram. 

 Coll. September 1897. 



Two leaflets grown together and alternating with a pair of 

 the other side of the common petiole (fig. 50). 



Sojyhora violacea Thw. 



Habitat Ceylon. 



ColL 1897. 



According to Klein the leaves generally uneqnally pinnate 

 frequently become equally pinnate in consequence of splitting 

 up of the terminal leaflet. From what follows it will be clear 

 that Klein probably has been wrong aud that his equally pin- 

 nate leaves have become so on account of the terminal leaflet 

 having grown rudimentary. The material examined was furn- 

 ished on a large scale by a specimen which commenced pro- 

 ducing abnormal leaves on a large scale. The changes refer to 

 the terminal leaflet as well as to the lateral ones of the upper 

 half of the leaf, the inferior ones maintaining their normal 

 character. 



The terminal leaflet may be: cup-shaped even to threadlike 

 with all transitory forms between them (figg. 51 6, h2e, 53, 

 54, 55^). The lateral leaflets show all degrees of coalescence 

 and this in such a way 1° that the petiolules of a pair cohere, 

 whereas the blades remain free, 2° that also the blades unite 

 (fig. 56), a) they either take the shape of a bifid whole (fig. 57) 

 or />) uniting also the other margins transform the bases into 

 a cup (fig. 58) or B° are reduced to a little thread (fig. 59 r/). 



It is worth noting that if two leaflets of the same pair 

 grow together the whole is at nearly right angles with the upper 

 surface of the compound leaf. In one case it occurred that a 

 leaflet is at the back and at top only folded up to a cup 

 (fig. 60), i. e. in the same way as has been observed in Tri- 

 foUum repens '), Codiaeum and Fragaria, p. 153. In order to 



1) Botanisch Jaaiboek, published by the Botanical Society Dodonaea 1892, p. 13, 



