248 PROCEEDINGS OF SECTION D, 



C. propinquum, Bail. — Speaking from leaf and flowering 

 material only, this tree belongs to an entirely different class to 

 C. Laubalii, C. Oliveri, a.nd C. virens, and more nearly approaches 

 the class in which C. Tamala is found, and I am quite prepared to 

 believe that the leaf oil does not contain camphor any more than 

 does that of C. Tamala according to Schimmel, loc. cit. 



Of all the Austrahan trees this approaches more nearly C 

 Tamala on a venation classification, but because I say this I do not 

 wish it to be inferred that I think it is a variety of it; far from it, 

 or the same species for the matter of that. 



It differs from C. Tamala in that the leaves are decussate, 

 closely packed, shiny, and glaucous underneath, ovate, acuminate, 

 rounded at the base, coriaceous, and under three inches long with 

 a thick flattened petiole. The panicles are smaller, whilst the 

 individual flowers are much larger. 



The remarks on this species are founded upon material 

 supplied by the late Baron von Mueller from Melbourne 

 Herbarium to F. M. Bailey, Colonial Botanist, Brisbane. 

 I certainly think the species a good one. 



Barks of the Species. 



Anatomy. — Barks procurable for this investigation were 

 C. Tamala, from India ; C. Lauhatti, from Queensland; C. Oliveri, 

 Queensland and N.S.W., and C. virens. 



C. Tamala is a much more irregularly constructed bark than 

 C . Laubaiii or Oliveri ; the bast fibres are not at all numerous, nor are 

 they uniformly arranged in concentric circles, but occur without 

 any order. The medullary rays are numerous about three cells 

 wide, and do not show a tendency to spread outwards, and paren- 

 chjona, bast and sieve tubes are well represented, especially on the 

 outer cortex, where masses of stone cells are frequent. This was a 

 difficult bark to cut and mount, owing to the presence of a large 

 amount of gummy substance. 



C. Laubalii. — This bark in microscopical transverse and longi- 

 tudinal sections shows a structure distinct from C. Tamala. It has 

 a regrJarity of arrangement of the various elements that go to 

 make up bark structure. Bast cells are prominent and numerous 

 and regularly arranged in concentric rings, mostly one or two deep, 

 separated by sieve tubes and bast parenchyma, coloured dark 

 brown, probably owing to the presence of a manganese compound. 

 There is quite an absence of the empty perenchymatous cells found 

 to figure so largely in C. Tamala, and also the gummy substance 

 there mentioned. Stone cells are present, but only to a limited 

 extent. The medullary rays, starting at the cambium a single 

 cell wide, gradually open out to six or more cells in the outer cortex. 



C. Oliveri. — This bark is more closely allied to C. Laubatii than 

 C. Tamala. The bast fibres are, however, more numerous than 

 any species examined, generally running in concentric rings of 

 threes, separated by sieve tubes, and the walls of compressed 



