20 



Table showing the probable evokition of Callitris species, as indicated b}- the 

 morphological, anatomical, and chemical results obtained during this research. 



C. robusta (W.A.)t 



C. verrucosa 

 (N.S.W. &C.A.)t 



C. tuberculata* (W.A. 



C. intratro]->ica 

 (N.A.) 



C. Druniniondii (W.A.) 



C. Roei* (W A.) 



C. Mon-isoni* (W.A.) 



C. propinqua (S.A.) 



C. glauca (N.S.W.) 



C. arenosa (N.S.W.) 



/^ 



GROUP I. 

 More or less tuberculate 

 fruits, and a convex dorsal 

 leaf surface. Sclerenchy- 

 matous or stone cells are 

 mostly absent in the leaf 

 tissue. 



The predominant limo- 

 nene in the leaf oils is dex- 

 tro-rotatory. 



C. gracilis (N.S.W.) 



C. oblonga (T.) 



C. calcarata (N.S.W.) C. Muelleri (N.S.W.) 



C. rhomboidea (N.S.W.) 



C.Tasmanica (N.S.W, &T,) 



GROUP II. 



Generally smooth fruits 

 and angular or rounded 

 dorsal leaf surface. Scle- 

 renchymatous cells in the 

 leaf tissue are in excess of 

 the species in Group I. 



The predominant )imo- 

 nene in the leaf oils is 

 Iccvo-rotatory. 



C, Macleayana (N.S.W. 



Leading to Araucaria 

 through Actinostrobus. 



GROUP III. 

 Generally smooth fruits, 

 and angled dorsal leaf 

 surface. Sclerenchymatous 

 cells occur plentifully in the 

 leaf tissue, especially in C. 

 Macleayana. 



Tlic ]iriiicipal tcrpciic in 

 the leaf oils is pinenc. 



|N.S.W.=New South Wales. 

 N.A. 



W.A.=West Australia. S.A. = South Australia. T. =Tasmania. 

 = North Australia. C.A.=Central Australia. 



• Placed tentatively, as it was not possible to obtain material for chemical investigation. 



