308 



Transactions. 



As we pass away from the midrib the aqueous' tissue consists of rounded 

 or polygonal cells which are not arranged in the definite rows found near 

 the midrib. 



37. Dianella intermedia End!. 



Habit. — This plant is a perennial herb, bearing namerous leaves, which 

 are crowded at the base of the stem. ^The leaves are linear, 1-1| ft. long, 

 % in. wide, and are arranged in two vertical rows (distichous) ; the bases 

 of the leaves are sheathing. The margins and the midrib are coloured 

 orange-red. 



Fig. 38. — Dianella intermedia. Transverse section of leaf ( X 24). a, cuticle ; h, stereome ; 

 c, vascular bundle ; d, aqueous tissue. 



Fig. 39. — Dianella intermedia. Transverse section through midrib of leaf (x 175). 

 a, cuticle of upper surface ; b, aqueous tissue ; c, chlorenchyma ; d, cuticle 

 of lower surface ; e, stoma ; /, stereome ; g, xylem ; h, phloem. 



Anatomij. 



Leaf (figs. 38-43). — Fig. 38 shows the general arrangement of the 

 tissues in a transverse section of the leaf. The vascular bundles are sur- 

 rounded by a large band of sclerenchyma, which traverses the whole width 

 of the leaf. Under the upper epidermis are some lignified cells, and in the 

 centre of each mass of chlorenchyma there is some aqueous tissue. Fig. 39 

 shows in more detail the structure at the midrib. 



