Cross. — Observations on some Xew Zealand Halophytes. 567 



numerous, and ellipsoidal in shape. (6.) Spongy parenchyma, 3 irregular 

 layers with large intercellular spaces ; the cells contain few chromatophores. 



Midrib is small, vnth. definite endodermis, the " starch-sheath " of Brick. 



Sections of the stem (fig. 14, h) were cut also to investigate the cause of 

 its roughness. It was found that this is due to little projections on the 

 surface, each of which is depressed in the centre to form a deep pit con- 

 taining a glandular hair, similar to those found on the leaves. All the walls 

 of the epidermis are thickened, the outer one being thickly cuticularised. 

 The cells themselves have curious prolongations towards the outer surface. 

 Each one contains a large drop of oil. 



14. Selliera radicans. 



The anatomy of two forms of leaf is described, : (a.) From the free 

 ascending branches of plants overhanging the channels ; these leaves have 



Fig. 1.">. — Selliera eadicans. 



a. T.S. of b in fig. 6, X 55. 6. T.S. of leaf from plant growing in pot, x 55. 



c. T.S. of d in fig. fi. x 55. 



an average thickness of 1 mm. (h.) From the creeping stems on the salt 

 meadows ; here the average thickness is 2 mm. 



