Jan. 1911.] BOTANICAL SOCIETY OF EDINBURGH 117 
(2) The mat-form. 
§ Stems suffruticose. 
The species of Acwnu (leaves thin, more or less silky). 
Helichrysum bellidiordes (Forst. f.), Willd. (stems slender, 
much-branching, leaves small, flat, tomentose beneath). 
Veronica Bidwillii, Hook. f. (stems much-branching, 
wiry; leaves very small, thick, glossy). 
§ Stems herbaceous. 
* Leaves tomentose. 
Helichrysum filicaule, Hook. f. (aerial stems, very 
slender, hardly branched, about 6 cm. tall). 
Gnaphalium Traversii, Hook. f. (leaves in rosettes which 
form close patches). 
“° Leaves pilose. 
Cotula squalida (stems slender, far-creeping; leaves 
deeply-cut, in open rosettes. 
“°° Leaves glabrous or nearly so. 
Asperula perpusilla, Hook. f. (stems filiform, leaves very 
small, thin). 
Hydrocotyle nove-zelandie, D.C. var. montana, T. Kirk 
(stems comparatively stout, matted; leaves small, coriaceous). 
Pratia angulata (Forst. f.), Hook. f. (stems rather fleshy ; 
leaves small, moderately thick). 
Uncinia divaricata, Boott (leaves grass-like, flat, some- 
what rigid). 
Wahlenbergia saxicola (R. Br.), A., D.C. (leaves in open 
rosettes about 15 mm. in diameter, thick, coriaceous). 
Poa anceps, Forst. f. var. (leaves sub-coriaceous, concave, 
tufted). 
(¢) THE RAOULIA-FORM. 
Several species of Raoulia (compos.), a genus consisting 
of seventeen endemic and one or two Australian species, 
are so characteristic of river-beds, and their growth-form 
plays such an important rédle in the evolution of the 
vegetation, that some special details seem necessary. 
The New Zealantdl species are either patch- (frequently 
circular-), or cushion-plants, but in this case both growth- 
forms are constructed in exactly the same manner, inter- 
