452 NOTES ON NATIVE FLORA OF NEW SOUTH WALES, V. 



iferous strata at Upper Burragorang, which point is the nearest 

 to Sj'dney known to me where E. albens occurs. 



Dispersal of seeds by birds is one of the methods first suggested 

 in considering problems of plant distribution, but the presence of 

 so many western forms on this area seems rather to indicate some 

 regulated, or systematic, rather than accidental dispersal. The 

 occurrence of E. albens near the Wollondilly could be very simply 

 explained if it could be shown that the species flourished 

 prior to the latest uplifts in Tertiary time, in which case it may 

 have extended right across the country now elevated, and con- 

 nected with the western areas where it is still growing, some forty 

 miles away. As it cannot withstand the cold, the effect of the up- 

 lift would probably have been to destroy the species in the elevated 

 region, unless the movement was slow enough to permit it to 

 become acclimatised while the alteration of levels was in progress. 



That Eucalypts and Casuarinas existed in late Tertiary time 

 is beyond dispute, both genera having been found fossil in rocks 

 of that period. It is probable that G. stricta flourished in Aus- 

 tralia prior to the latest earth movements along the eastern 

 portion of the Continent, but there is no evidence available to 

 prove an equally early existence for Eucalyptus albens. For the 

 present, therefore, the distribution of these various species 

 remains an interesting subject for investigation. 



The complete list of Eucalypts noticed over the area described 

 in this paper is as follows : — E. stellulata, E. coriacea, E. Macar- 

 thuri, E. regnans (E. fastigata), E. tereticornis, E. amygdalina, E. 

 dives, E. numerosa, E. Sieberiana, E. hcemastoma, E. maculosa, E. 

 rubida, E. viminalis, E. acervula (E. paludosa), E. quadrangulata, 

 E. piperita, E. vitrea, E. eugenioides, E. capitellata, E Bridgesiana, 

 E. melliodora, E. albens, E. Bosistoana, E. Smithii, E. macro- 

 rrhyncha, E. punctata. 



EXPLANATION OF PLATES. 



Plate xxxiv. 

 Eucalyptus Macarthuri Deane and Maiden (Woollybutt); Bowral. 



Plate xxxv. 

 Wollondilly River, Wombeyan Caves Road, looking South; Casuarina 

 Cunninghamiana ivJiq. (River-Oak) along the water's edge. 



