174 



Fig. 17 (magnified 45 X). Left half of a section through 

 a knob, containing two meristems; a complète 

 procambial connection (proc) has been established 

 between tlie meristem (m), the upper side of which 

 is lying free within a slit-shaped space (s) and the 

 vascular bundle (b.b) of the mother-leaf. 



Fig. 19 (magnified 12 x). Section of a very big knob 

 containing 2 adventitious buds (Wi and m^) that 

 hâve developed allready considerably. In the axil 

 of one of the two primary leaflets of the bud mi 

 an axillary bud (ax) is visible. 



Fig. 20 (magnified 12 x). Transverse section through a 

 knob and the sprout, that has arisen lately from 

 it, Within the knobs tissue between the vascular 

 bundles of the leaf (b.b.) and the bundles of the 

 sprout (g) some small groups of tracheids are 

 présent, but there is nothing that can be compared 

 with the complète procambial connection of fig. 17; 

 ax. axillary bud. 



Plate IV. 



Fig. 18 (magnified 45 x). Low power view of a prépara- 

 tion showing a bud m within a slit-shaped space 

 (s); pr.c. rows of compressed cells; b.b. vascular 

 bundle. 



Fig. 21 (magnified 12 x). Transverse section through the 

 apex of the sprout that has been figured in fig. 6 ; 

 gl glandular tissue on the swelling (p) at the 

 base of the pétiole ; v. végétative cône ; ax. axillary 

 bud; g. vascular bundles. 



Fig. 22 (magnified 12 x). Diagrammatic drawing of the 

 vascular connection between an adventitious sprout 



