EXPLANATION OF PLATES II, III and IV, 



Illustrating J. van Beusekom's paper: „0n the influence 



of wound stimuli on the formation of adventitious 



buds in the leaves of Gnetum Gnemon L." 



PL II, fig. 12 has been drawn under an A b b e's caméra 

 lucida, using Leitz' Obj. 6, Oc. III. In the same manner 

 caméra drawings were made for the flgs. 8, 9, 10, 11 of 

 PI. II and 13, 14, 15, 16a of PI. III ; thèse drawings were 

 photographied half size, copied from the glass plate on 

 drawing paper with the aid of a retouching apparatus and 

 afterwards accomplished. Figs. 16, 17 (PI. III) and 18 (PI. IV) 

 were drawn with Leitz' Oc. I and Obj. 6 after the front- 

 lens of the latter had been unscrewed, the other figs. 

 which are not natural-sized with the hand-magnifler. 



Plate IL 



Fig. 1 (magnified 4 X). Knob with entirely suberized sur- 

 face, that has opened lately; at the apex of the 

 adventitious sprout the flrst pair of leaflets is seen 

 developing. 



Fig. 2 (natural size). Adventitious sprout with 1 pair of 

 scale-shaped and 3 pairs of ordinary leaflets. 



Fig. 3 (natural size). Kamifled adventitious sprout. 



Fig. 4 (natural size). Apical half of a leaf, the yellow and 

 thickened tip of which is shovving numerous small 

 spécial thickenings and one big knob. 



