310 



Transactions. 



Below this there is a hypoderma, from 1 to 4 cells deep, which consists 

 of regular cells with lignified walls. Above the sclerenchyma bands this 

 layer is only 1 cell thick, but above the chlorenchyma 2-3. 



Fig. 41. — Dianella intermedia. Transverse section of margin of leaf ( X 260). a, cuticle ; 



b, sclerenchyma. 

 Fig. 42. — Dianella intermedia. Surface view of epidermis of lower surface (x 260). 



a, opening above stomata. 

 Fig. 43. — Dianella intermedia, a, guard-cells : b, cuticle. 



The sclerenchyma consists of irregular cells with small cavities. Near 

 the upper surface of the leaf these cells are much larger than they are near 

 the lower surface. 



The band of lignified cells beneath the upper epidermis is continued 

 down beside each band of sclererchyma. Here it is 2 cells wide, and con- 

 sists of oval cells. 



