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



Great Dividing Range. Some of these, which are able to with- 

 stand a fairly cold elevation, have simply continued over the 

 range and down the valley of the Wollondilly to the locality 

 under discussion. But several are western plants which invari- 

 ably avoid the cold heights, and their presence in this valley 

 requires an explanation which presents difficulties. 



The following list of Eucalypts will give a general idea of the 

 gradual divergence of the flora from coastal to western forms. 

 Between the 22-mile post and the Caves the Eucalypts noticed 

 were : — E. eugenioides, E. viminalis, E. vitrea R. T. Baker, E. 

 melliodora A. Cunn.(Yellow Box), E. Bosistoana, E. Bridgesiana 

 R. T. Baker (Apple Tree or Woollybutt, and one of the trees 

 regarded by Baron von Mueller as E. Stuartiana F.v.M., the 

 latter name being still retained by Mr. Maiden), E. tereticornis, 

 and E. albens Miq., the common White Box of the western slopes. 



The above were all noted between the 22- and 27-mile posts, 

 and with the exception of E. Bosistoana, continued intermit- 

 tently right across the Wollondilly valley. E. viminalis was left 

 on the highland, but reappeared on the opposite side when the 

 elevated country was again reached. E. albens on the other 

 hand found the hill tops on either side of the valley too cold, and 

 ceased at about the 34-mile post or eight miles from the Caves. 



At intervals on the porphyritic area a Stringybark was noticed 

 which was thought to be a form of E. eugenioides, but which, 

 from specimens I collected, has been recognised by Mr. Baker as 

 E. Wilkinsoniana R. T. Baker. 



After passing out of the Wollondilly canon near the 39-mile 

 post, where the height of the gap is about 2,400 feet above sea^ 

 level, the Eucalypts passed on the descent to the Caves were : — 

 E. melliodora, E. tereticornis, E. Bridgesiana, E. eugenioides, E. 

 macrorrhyncha F.v.M. (Red Stringybark), E. viminalis, E. dives, 

 E. capitellata, and E. stellulata Sieb. (Black Sally), the latter only 

 occurring on the flat just above the Cave house. 



The presence of E. macrorrhyncha is suggestive of western 

 rather than coastal conditions. It is the common stringybark of 

 the ridges on the western slopes, and occurs practically along the 



