BY K. H. CAMBAGE. 551 



and, in the month of August, is laden with masses of ex- 

 tremely beautiful flowers. This is one of the Wattles which 

 has its blossoms arranged in spikes instead of little round 

 balls. A . longifolia, of which the former is sometimes re- 

 garded as a variety, was confined to the sandstone-area, a 

 formation which .4 . floribunda usually avoids, preferring the 

 shale-areas ; and the two trees appear to be specifically dis- 

 tinct. 



The stately Acacia elata, with its broadly pinnate leaves 

 which somewhat resemble those of the common Pepper-Tree 

 (Schinus /nolle), was noticed in the deep gullies beside the 

 descent into Burragorang. Its pinnate leaves have suggested 

 for it the name of Cedar Wattle. This species is well known 

 in the gorges of the Blue Mountains, and, until recently, 

 could be seen from the train at Narara near Gosford. 



Angophora subvelutina was confined to the shale-area near 

 Camden, its chief distinguishing characteristic, when com- 

 pared with A . intermedia in the field, being its broad cordate 

 leaves. .4. intermedia, and its remarkably narrow-leaved 

 variety were noticed at intervals beyond The Oaks, all three 

 being known as Apple-Tree. .4 . lanceolata, a so-called Red 

 Gum, was restricted to the sandstone-formation as usual. 



E ucalyptus hemiphloia, the common Grey Box, was found 

 only on the shale-formation, showing its customary aversion 

 to the sandstone. 



The various Ironbarks were either on the deep shale, or 

 where the sandstone was thinly coated with shale. 



E. maculata, the well-known Spotted Gum, occurs just 

 where the monoclinal fold, already alluded to, has thrown 

 down the shales and exposed the Hawkesbury Sandstone, about 

 four miles before The Oaks is reached. This species, which 

 produces a timber famous for its tensile strength, is widely 

 distributed throughout the coastal districts of New South 

 Wales. By the casual observer, erect trees of Angophora 

 lanceolata are sometimes mistaken for E. maculata. In going 

 south from Sydney along the Illawarra railway line, the 



