PLATE WN— continued. 



Fig. 19 (x 20). — Medium longitudinal section of apex of young plant, 

 showing the glands covering the young organs in the bud. 



Fig. 20 (x 20). — Proliferation of the suspensor, resulting in the forma- 

 tion of numerous embryos. 



Pigs. 21 and 22 ( x 175). — Early stages of a similar proliferation. 



Fig. 23 (x 10). — Transverse sections through the seedling. 



a, atlbase of the cotyledons ; b, at some distance below a. Bundles 

 ( X ) result from the fusion of two of the cotyledonary bundles. 



Fig. 24 {a—;/ x 10, y x 5). — Sections a—f., transverse ; g, longitudinal, 

 to show the relation of the bundle systems of the root and stem 

 to one another, and to the feeder. 



Fig. 25 (x 20). — Transverse section of the feeder near to the hypocoty- 

 ledouary stem. 



Fig. 26 (x 325). — Young sclereuchyma cells, seen in longitudinal section 

 of the youug stem. Each cell with two nuclei. 



Fig. 27 (x 550). — From longitudinal section of bud of old plant, show- 

 ing perforation of wall and fusion of contents of two laticiferous 

 cells. 



Fig. 28 (x 550). — Longitudinal section of wall of a laticiferous vessel 

 seen obliquely, and showing the sac-like outgrowths encroaching on 

 the cavity of the neighbouring cells. 



Fig. 29 (x 550). — Young laticiferous cells from longitudinal section of 

 an old bud ; one of them has two nuclei. 



Fig. 30 (x 550). — Longitudinal section passing through young laticifer- 

 ous vessel, transverse wall surrounded by highly refractive mass, 

 (cf. text.) 



