Hekriott. — Plants from the Southern Islands. 411 



" In winter it has rather dense rosettes, crowded together, 

 of dark-green imbricating leaves, the four or five outer leaves 

 much larger than those crowded internally. In spring the 

 rosettes open out, and the new branches spread out radially, 

 with their tips ascending."* 



Hab. — " Lord Auckland Group : near the sea on rocky 

 islets in Rendezvous Harbour. "f 



In the Pleurophyllum meadow of Auckland Island " are 

 grass-like tufts of Scirpus aucliandicus and the silvery-leaved 

 Helichrysum prostratum, and very frequently associated with 

 these are the shining green winter rosettes of Gentiana cerina^X 



There are several rosettes of this plant on the rockery ; 

 it has grown and spread since it was planted there last year. 



Anatomy (fig. 21). — The leaf I examined was very thick and 

 coriaceous, with recurved margins. There is a more or less well- 

 defined smooth cuticle (cut.) on the upper surface. The upper 

 epidermal cells (ep.) are thick- walled, and slightly rectangular 

 in shape. Those of the lower epidermis (l.ep.) are smaller, 

 with thinner walls, no cuticle, but interrupted by numerous 

 stomata (st.). The chlorenchyma is differentiated into palisade 

 tissue (pal.) — consisting of oval cells in four layers and densely 

 filled with chlorophyll — and spongy tissue, which makes up 

 the greater thickness of the leaf, being about double that of 

 the palisade. This tissue is loosely arranged, leaving numerous 

 air-spaces (a.s.), and is not so densely filled with chlorophyll. 

 The vascular bundle (v.b.) is surrounded by an endodermis 

 (endo.) of colourless cells, surrounded by the larger chlorophyll 

 containing cells of the mesophyll. The recurved margins of 

 the leaf, together with the rosette formation, serve to protect 

 the stomata on the under surface, and so check the rate of trans- 

 piration of the leaves. 



Myosotis capitata, Hook. f. 



" Leaves radical, linear, obovate or lanceolate, obtuse, 2 in. 

 to 4 in. long, narrowed into broad petioles, hispid-pilose on both 

 surfaces ; cauline linear, oblong or spathulate, sessile. "§ 



" In winter it presents semi-rosettes of rather thick, soft, 

 dark-green leaves, covered on the upper surface with bristly 

 white hairs. The stems are prostrate, but with the extremities 

 ascending and forming roundish tufts + 16 cm. in diameter, 

 and 6 cm. from the surface of the ground. The leaves are 



* Cockayne (1903), p. 263. 

 t Hooker (1847), vol. i, p. 54. 

 j Cockayne (1903), p. 259. 

 § Hooker (18G4), p. 194. 



