AND THEIR ESSENTIAL OILS. 191 



was soluble in 3 volumes 80 per cent, alcohol. The pres- 

 ence of aroniadendral and absence of piperitone in the oil 

 of A', obiiqud is a distinguishing feature, and enables these 

 trees to be easily separated from all allied forms growing 

 in Tasmania. 



EUCALYPTUS RODWAYI (nobis). 

 C' Apple-scented Gum " or " Block Gum." ) 

 (Plate II.) 

 Botany. 



Historical. — This species was introduced to the scientific 

 world by Mr. J. II. Maiden, who recorded it in Proc. Roy. 

 Soc. Tas. 1902 (p. 83) under the name of A\ M acorthuri, 

 as he considered it to be identical with the New South 

 Wales tree of that name, his attention having been drawn 

 to it bv Mr. R. H. Cambage, F.L.S., who first saw it at 

 Deloraine. 



Kernarks. — It was hoped when this research was under- 

 taken that this species would be found to be the true A'. 

 Macarthuri, on account of the valuable oil yielded by that 

 species, but the investigation has proved otherwise. The 

 species is now fully described here, and is dedicated to 

 Mr. L. Rodway, Government Botanist of Tasmania, who 

 has laboured so long and done so much for botanical 

 research in the island State. 



The " sucker " leaves are quite distinct from those of 

 E. Macarthuri, whilst the fruits, normal leaves, and buds 

 are, as a rule, smaller. It differs also from that species 

 in the nature of the bark and timber, as well as chemical 

 constituents of the oil. 



In a botanical sequence it might be placed in the 

 llemiphloise group of Eucalypts. 



It is a valuable addition to the timber industry of Tas- 

 mania. 



Sifsteviatic Description . — A large forest tree, specimens 

 4 feet in diameter being common. Bark more like the Bo.x 

 barks than any other cortical section of the Eucalypts, 

 and persistent on the stem and branches. " Sucker " 

 leaves under 3 inches long and about ^-inch broad, oval- 

 lanceolate to ovate-lanceolate inclined slightly to falcate, 

 petiolate, alternate, almost membraneous, same shade of 

 green on both sides, venation not well pronounced, later il 

 veins distinctly oblio('»^ '^t the base and less so upwards 

 towards the aper 



