328 A. A. HAMILTON 



via the Malayan Archipelago and crept down the Queens- 

 land coast, it has not yet spontaneously reached a station 

 south of our northern river system in New South Wales, 

 and probably most of the trees in that district were planted 

 by the settlers. That cooler climatic conditions offer no 

 obstacle to its progress southwards has been amply demon- 

 strated by the success attendant upon its acclimatisation 

 in the southern Illawarra. 



In a valley draining into Cabbage-tree Bay, and running 

 parallel to the ocean escarpment, a typical coastal gully 

 flora is encountered. On the banks of the watercourse a 

 solitary example of the purple berried Eugenia cyanocarpa 

 F.v.M., was seen heavily loaded with fruit, though but a 

 slender shrub eight feet high. The fruiting of this tree in 

 the juvenile stage is mentioned by Messrs. Maiden and 

 Betche in a note on the species. 1 The Mock Orange 

 Pittosporum undulatum Andr., a shapely ornamental tree 

 when growing in the brush forest, is somewhat cramped on 

 this rocky hillside, presenting a straggling appearance and 

 a sparse leafage. The Sydney Black Wattle, Callicoma 

 serratifolia Andr., a withy stemmed shrub, the sole repre- 

 sentative of a genus endemic in Australia, was noted in its 

 customary position among the boulders in the watercourse. 



A halophytic shrub Glocliidion Ferdinandi J. Muell., 

 which also grows near the watercourse, and frequents the 

 foreshores of the harbour, is extremely sensitive to frost 

 when growing at a distance from tidal waters. This 

 inability to withstand frost when removed from a saline 

 environment is even more pronounced in the soft-wooded 

 Hibiscus diversifolius Jacq. Seeds taken from a chaparal 

 of these plants growing close to the water's edge at Botany 

 Bay were propagated at the Centennial Park, and the 

 resultant plants made a sturdy growth, attaining their full 



1 Proc. Linn. Soo. N.S. Wales, Vol. xxix, p. 741. 



