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



eugenioides, E. tereticornis, Panax sambucifolius Sieb., Brachycome 

 linearifolia DC, Helichrysum lucidum Henck. (H. bracteatum 

 Willd.), H. scorpioides Labill., H. semipapposum DC, H. leucopsi- 

 dium DC, Wahlenbergia gracilis DC (Blue Bell), Leucopogon 

 lanceolatus R.Br., Plantago varia R.Br., Persoonia linearis Andr. 

 (Geebung), Lomatia silaifolia R.Br., Casuarina suberosa Ott. & 

 Dietr., Exocarpus cupressiformis Labill., Dianella ccerulea Sims, 

 Eustrephns latifolius R.Br., Stypandra glauca R.Br., Themeda 

 Forskalii Hack. (Anthistiria ciliata Linn., Kangaroo Grass), Stipa 

 sp., Adiantum sp., Pteris sp., Blechnum cartilagineum Swartz. 



From Bullio to Wombeyan Caves. 



After passing the 22-mile post near Bullio, the Triassic forma- 

 tion is left behind, and an area of porphyritic and granitic 

 country continues practically the whole way. Much of this area, 

 at least down the river towards Burragorang, was formerly 

 covered by Permo-Carboniferous and Triassic strata which have 

 been removed by denudation, thus exposing the rounded igneous 

 hills which form the present surface. The margin of this igneous 

 area is defined in many places by a line of stupendous sandstone 

 cliff's quite a thousand feet high; that on the eastern side, which 

 divides the waters of the Wollondilly from those of the Nattai, 

 presents in places an impenetrable barrier, and with its towering 

 height and extensive grey rugged front, impresses the observer in 

 all its natural grandeur, especially when illuminated with the rays 

 of the western sun. Through the hard granite and porphyry rocks 

 the Wollondilly is incising its channel, and already, according to 

 figures kindly supplied by Mr. E. C Andrews, has succeeded in 

 entrenching itself to a depth of 2100 feet from the top of Bullio 

 Trig. Station to its present level. The high bluff overlooking the 

 river (Plate xxxv.) is fully 1500 feet above the stream, so that the 

 grandeur of the valley is at once apparent. The river at the 

 ford is about 620-630 feet above sea-level. 



A sample of the porphyritic rock taken from the vicinity of 

 the 35-mile post has been kindly identified by Mr. G. W. Card, 

 A.R.S.M , as a typical quartz-porphyry, and he adds that a 



