SEEDLING AND ADULT ANATOMY OF WELWITSCHIA MIRABILIS, 
Fig. 18. Transverse section of lobe of the crown in fig. 4. O = original bud-bundles ; R = irregular 
bundles supplying inner ridge. x 75. 
19. A small part of a transverse section through the outer ridge of the plant in Pl. 84. fig. 2. 
F — calcium oxalate fibre ; Tr — transfusion tracheid. x 170 
20. Bundle from outer series in the outer ridge of plant drawn in Pl. 84. fig. 2. Cf — centrifugal 
side of bundle; Cp = centripetal side of bundle; Pxy = protoxylem; Ph — phloem; 
Tr = transfusion tracheid. x 116 
91. Transverse section of bundle from young inflorescence axis, showing all the elements to be 
arranged in radial rows. x 170. 
2. One of four concentric groups of vascular tissue in the hypocotyl of the young seedling shown 
in Pl. 34. fig. 1. C = bundle supplying cotyledon ; L = bundles supplying leaf; the other 
bundles probably represent the newly intercalated secondary leaf-bundles and the bud-bundles. 
Note the scattered tracheids in the centre of the group and the protoxylem group at the 
apex of bundle C. (See text, p. 341.) x 170. | 
23. Diagram of C-shaped leaf-trace supplying the abnormal leaf in the plant drawn in Pl. 34. 
fig. 8. LG = boundary of leaf-groove. ; 
24a, c, & 246 (see Pl. 34). Various elements of the xylem showing pitting and thickening. 
V = vessel; T = tracheid. 
wo 
