XXII] 



ANATOMY 



159 



Fig- 443; _ 171^'- Transverse sections, in succession from below, of the axis of a young plant of Anemia 

 Phyllitidis. i, the protostele gives off a leaf-trace without any interruption of the endodermis: 

 11, protostele higher up : iii, still higher, with central pith : iv, same stele giving off a leaf-trace, 

 again without interruption of the endodermis ; note isolated tracheide in the pith. 



V, vi. Transverse sections of adult stele of Schizaea rupestris. vi shows continuous xylem round 

 central pith : v shows departure of a leaf-trace, to the left a root-trace. The endodermis is dotted. 

 (X150.) 



Fig. 444. Schizaea dichotoina. Plan of 

 stelar construction in an adult stem. 

 Outer endodermis, e)i\ phloem cross- 

 hatched : .xylem black : sclerenchyma 

 dotted: parenchyma white. There are 

 endodernial pockets of varying depth, 

 and isolated spindles of inner endodermis 

 and wood in the sclerenchyma. (After 

 J. ]\FL. Thompson.) 



