14 



8. C. gracilis, R. T. Baker. 



9. C. cahanita, R.Br. 



10. C. rhomboidea, R.Br. 



11. C. Tasmanica. Nobis. 



12. C. Drummondii. Benth. et Hook. f. 



13. C. Roei, Endl. 



14. C. Morrisoiii, R. T. Baker. 



15. C. Miiclleri, Benth. et Hook. f. 



16. C. obloiigu, Rich. 



17. C. Madeayana, Benth. et Hook. f. 

 iS. C. s/). Hot'., Nobis. Not placed. 



I. HISTORICAL. 



This genus was established by ^'entenat in 180S, but there is nothing, or rather 

 no specimen e.xtant, to show upon which Austrahan pine the name was bestowed, 

 as he mentioned no species, and so it is not now known upon which tree he founded 

 the genus. It is, however, conjectured b\- several authors to be C. ciipressi- 

 formis which is now recognised as C. rhomboidea of Robert Brown. 



Mirbel, of the Paris Herbarium, thinking Ventenat's name of Callitris too 

 closely resembled in sound that of Labillardiere's genus Calythrix of the Myrtaceous 

 Group of plants, substituted the name of Frenela, but this has not found acceptance 

 with recent botanists, nor can it stand h\ the law of priority, and so it has to give 

 place to the older nomenclature. 



It was originally intended to include under Callitris the North African pine 

 Thuja articiilata, — the C. qiiadrivalvis of Richard, and Frenela fontanesii of Mirbel, 

 but after examining complete botanical material of this tree we were convinced that 

 the differences were so important as to be worthy of generic classification — an 

 agreement quite in accord with the researches of Masters (" Jour. Linn. Soc, 

 Lond.," Bot., Vol. XXX, No. 205, p. 14 , who also regarded it as distinct under the 

 genital name of Tetraclinis arliculata, following the sectional name Tetraclinis of 

 Bentham and Hooker, "Gen. PI." In fact, Dr. Masters, loc. cit., also supports 

 the separation of the South African species of pines from the North African and 

 Australian, under Endlicher's name of Widdringtonia . 



To Mr. D. E. Hutchins, Director of Forests of South Africa, we are much 

 indebted for material of the pines of South Africa, for comparison with the 

 Australian Callitris ; the result of our examination is that we are in accord with Dr. 

 Masters' views, as his classification appears to be a rational one, for no plant with 

 the actual characteristics of the Australian Callitris has so far been recorded from 

 either North or South Africa, or, in fact, from any part of any other continent 

 but this. 



