420 BOTANICAL GAZETTE | DECEMBER 
Fig..11. Transverse section of O. cinnamomea through nearly the same 
region in another plant. 
Fig. 12. Transverse section of same plant as in fig. zz, but lower down. 
FIG. = Transverse section of same plant as in fg. 72, but lower down. 
1G. 14. Transverse section of the central cylinder of O. céanamomea, 
sin intectial endodermis and brown sclerenchyma in the medulla. 
PLATE XVI, 
Fig. 15. Transverse section of central cylinder of O. cimnamomea, show- 
ing internal endodermis and an absence of brown sclerenchyma in the 
medulla. 
Fic. 16. Transverse section of the stem of O. cimmamomea in the region 
of forking, showing absence of ramular gaps. 
Fic. 17. Transverse section of the stem of O. Clayfoniana. 
Fic. 18. Transverse section of the stem of O. Claytoniana in the region 
IG. 19. Transverse section of the stem of O. rega/zs in the region of 
IG. 20. Transverse section of the central cylinder of O. i i show- 
ing brown sclerenchyma in the medulla. 
PLATE XVII, 
FIG. 21. actin veews section of the central cylinder of O. cénmamomea, 
showing internal phloem 
Fie. 22. A part of tlie central cylinder of O. cinnamomea shown in fig. 
2z more highly magnified. 
Fig. 23. A transverse section of the young sporophyte of O. Clayfoniana, 
showing one foliar gap, und the corresponding leaf trace opposite. 
IG. 24. Transverse section of the stem of 7. darbara, showing brown 
eimai in the medulla. 
G. 25. Transverse section of a part of the stem of 7. barbara nearer the 
sehte point. 
G. 26. Transverse section of Lyginodendron Oldhamium, showing 4 
leaf gap, a leaf trace opposite, strands of sclerenchyma in the medulla, and 
strands of primary xylem centrad of the cylinder of secondary xylem. 
