BY J. H. MAIDEN. 275 



The elevation of the locality (now its most southern range) is 

 from 1,500 to 2,000 feet, which is the same as its elevation on 

 the Cambewarra Mountain. It is perhaps worthy of remark that 

 the two species, both the northern and southern, should meet and 

 find their respective limits pretty well in a line east and west, 

 and that D. aromatica should not descend to the level of D. 

 dipeiala. 



A parallel case occurring in the same region is furnished by the 

 two species of Telojjea. Neither B. dipetala nor Telo-pea speci- 

 osissima crosses over from the sandstone to the granite, nor do T. 

 oreades and D. aromatica cross from the granite into the sand- 

 stone. And it is also remarkable that the two southern species, 

 as they proceed further and further south, attain the size and 

 their greatest perfection in the same locality, just across the 

 boundary in the Gippsland ranges. 



Marsdenia flavescens, a. Cu7in., and M. viridiflora, R.Br. 



N.O. Asclepiadeae.^ 



It was the Rev. Dr. Woolls who first drew attention to the 

 fact that the tuberous roots of these species are edible. They are 

 called " Native Potatoes," and the blacks were accustomed to eat 

 them after some preparation. They are probably referred to in 

 the following account of Captain Hunter's Expedition up the 

 Hawkesbury, July 1788. 



" On the banks here we also found yams and other roots, and 

 had evident marks of the natives frequenting these parts in search 

 of them for food. They have no doubt some method of preparing 

 these roots before they can eat them, for we found one kind which 

 some of the company had seen the natives dig up, and with which 

 being pleased, as it had much the appearance of horse-radish, and 

 had a sweetish taste, and having swallowed a small quantity, it 

 occasioned violent spasms, cramps in the bowels, and sickness of 

 the stomach ; it might probably be the cagada root." (Historical 

 Journal, p. 153.) 



