^59 



14. Callitris Morrisoni, 



p. T. Baker, Proc. Linn. Soc, N.S VV .. Nov., 1907, 



Habitat. 



Killerberrin (Dr. A. !MoiTison\ South-west Australia (F. S. Roe', Murchison 

 River A^'. A. 01dlield\ 



I. HISTORICAL. 



Dr. A. Morrison, then Government Botanist of \^'estern Austraha, was the 

 first to bring this species under notice, and when forwarding material, stated 

 that it was collected by Mr. F. H. \'achell at Killerberrin in July, 1903. On 

 comparing it with known species of Callitris, it was apparent that it was unrecorded 

 and so was described bv one of us, loc. cit., as a new species. 



When inspecting the collections at the Kew Herbarium in 1904 it was foimd 

 that similar material had been collected in South-West Australia by F. S. Roe, 

 and in looking over the Melbourne Herbarium later it was discovered that Oldfield 

 had also collected specimens of this Conifer on the Murchison River, Western 

 Australia. 



The Kew Herbarium specimen, labelled " Inter. S. W^ Australia, F.S. 

 Roe, Esq., C. robiista, J.D.H., Hookerian Herb.," is identical with that at Mel- 

 boiuTie collected by Oldfield. In the " Flora Australiensis " there appccirs to 

 be no reference to thess particular specimens. 



Only herbarium material was prociu-able, so that it was not possible to 

 carry out chemical investigation of the leaves, bark, and timber on the lines followed 

 in the case of nearly all the species of Callitris investigated here, but the morpho- 

 logical characters are sufficient to warrant a differentiation in s\'stematic botany; 

 for brieflv, the cones are similar in shape to those of C. Drummondii, and the 

 branchlets with the decurrent leaves identical with those of C. °lauca. 



II. SYSTEMATIC. 



It is a tree 20 to 30 feet high occurring on rock}- places i^Oldfield". Branchlets 

 with decurrent leaves glaucous, erect, terete, internodes exceptionallv short, in 

 fact, shorter than those of most other species. Free ends of leaves blunt, appressed, 



