121 



small side figures a, b, c etc repre- 

 senting cross-sections of the pith at 

 different points in the stem and 

 showing the alterations in the rela- 

 tive positions of the phloem bun- 

 dles. 1,1 leaf insertions; br branchs; 

 t tendrils; ab abortive buds; c, c ano- 

 malous cambium; m m medullary 

 rays of the anomalous formations; 

 m' m' the same of the next higher 

 internode ; /, g cross-sections of pith 

 at points in the nodes where the 

 communication with the normal cam- 

 biums occur; 0, o as in preceding 

 figure. 



Fig. 3. Diagram of the course of the 

 normally oriented fibro-vascular bun- 

 dles : n, n, n nodes ; It b leaf-trace-bun- 

 dles; br,b bundles from branches 

 br' br" etc; abb bundles from abor- 

 tive buds; tb bundle fi'om tendril; 

 u bundles formed by union of bun- 

 dles of higher internodes. 



Fig. 4. Cross-section of vegetative mem- 

 bers just above a very young node , 

 X 14: St internode, i. e. apparent 

 axis , probably representing the axil- 



lary bud of leaf l^; b axillary bud 

 of leaf Z^ destined to grow to a 

 branch ; t tendril, i. e. real morpho- 



logical axis. 



Fig. 5. lodes ovalis Bl. 



Cross-section of a node, X 12: It, It out- 

 going leaf-traces ; t tendril ; r, r ring 

 of first-formed secondary wood; I 

 beginnings of the lobes; b bast; pc 

 pericycle ; cp cortical parenchyma ; 

 e epidermis; p pith; Ip lignified pa- 

 renchyma closing the gaps in the 

 vascular ring; Ic small groups of 

 lignified cells. 



Fig. 6. Pyrenacantha scan- 

 dens Harv. 



Cross-section of a small dried stem X 12 : 

 I, I lobes or prominences of the wood ; 

 bp bast-plates ; sx parenchymatous 

 xylem ; sb soft-phloem ; m medullary 

 sheath; pc pericycle. 



Figs 1, 4, 5, 6 ad nat del. 



