Ch. IV] WARM TEMPERATE MOIST SUMMER DISTRICTS 485 



together, sometimes at considerable distances apart. Of the tree-ferns, Alsophila 

 australis, R. Br., and Dicksonia antarctica, Labill. (Fig. 252), predominate. Even 

 vegetation on the ground is often for miles composed only of ferns of the"; most 

 varied forms, for instance Pteris aquilina, Linn., P. incisa, Thunb., Asplenium 

 bulbiferum, Forst, A. aculeatum, S\v., species of Lomaria, Davallia dubia, Gaud., 



Fig. 252. Natural forest in the Park at Sydney. From a photograph. 



Gleichenia flabellata, R. Br., and G. circinata, Sw., and herbaceous ferns clothe the 

 stems of the tree-ferns as epiphytes, for instance Polypodium grammitidis, R. Br., 

 P. australe, Mett., Aspidium capense, Willd., Hymenophyllum tunbridgense, Sm. 



Other parts of the forest present a different picture, more like that of a typical 

 rain-forest. Its underwood, composed of dicotyledonous trees and shrubs, together 



