Herriott. — Plants from the Southern Islands. 399 



some slight modifications on that of Cop. cuneata, but possesses 

 in common with it a strongly wrinkled cuticle and numerous 

 oil-globules throughout its tissue. 



Anatomy (fig. 11). — There is a distinct and wrinkled cuticle 

 (cut.) on both surfaces. The cells of the upper epidermis (ep.) 

 are large, and contain numerous oil-globules (o.g.). Stomata (st.) 

 are found only on the lower epidermis (l.ep.), the cells of which 

 are much smaller than those of the upper. The chlorenchyma 

 is differentiated into palisade (pal.) — two layers of large palisade 

 cells, much larger than those of Cop. cuneata, and containing more 

 chlorophyll ; the spongy tissue (sp.) makes up the greater por- 

 tion of the leaf, and is more loosely arranged than that of Cop. 

 cuneata. Bundles of raphides (r.) are arranged in certain of its 

 cells. There is a distinct endodermis (endo.) surrounding the 

 vascular bundles (v.b.). All the tissues contain a considerable 

 amount of small oil-globules (o.g.) 



Olearia lyalli, Hook. f. 



; ' Leaves broadly ovate or orbicular-ovate ; abruptly acu- 

 minate ; densely tomentose, newly formed leaves white above 

 and below, the tomentum on the upper surfaces falling away 

 in the first winter. ^Mature leaves very thick and coriaceous, 

 doubly crenate with short sheathing petioles; on young speci- 

 mens growing in the shade leaves are much thinner and very 

 large."* 



' The under surface is densely clothed with flannelly to- 

 mentum quite white in colour. This tomentum is rather more 

 than half the thickness of the leaf-substance proper. The young 

 leaf just when it is unfolded from the bud is white and soft like 

 a piece of flannel, being extremely tomentose on both sur- 

 faces. "f 



Rah. — This tree is extremely local in its distribution. It is 

 not found at all in New Zealand, but occurs only on the Snares, 

 where it is the principal tree on the island. " On Ewing Island, 

 and perhaps to a verv limited extent on Auckland Island 

 itself."* 



Snares Island : This tree, by reason of its white -covered 

 leaves, gives a peculiar grey or whitish hue to the foliage. Kirk 

 describes its mode of growth as follows (1891, p. 215) : " When 

 growing in level situations it is erect, with open spreading 

 branches ; but when growing on slopes exposed to the wind it is 

 often inclined or with a prostrate trunk, the roots partly torn 



* Kirk (1891). p. 216. 



f Cockayne (1903), p. 253. 



% Cockayne (1903), p. 252. 



