146 



CONIFERALES (RECENT) 



CUPRESSINEAE. The absence of resin-canals in the xylem is a feature 

 shared by other families; but in the occurrence of xylem-parenchyma in 

 different regions of the wood the Cupressineae differ as a rule from the Abie- 

 tineae, though this is not a constant distinguishing character. The pits in 

 the field vary from 1 to 6 or' 8 in some genera, e.g., Taxodium and Glypto- 

 strobus 1 : Gothan 2 applies the term Cupressoid to medullary-ray pits character- 



FIG. 



Araucaria excelsa. A, Mature form. B, Seedling, (f nat. size.) 



ised by an upper and lower border (fig. 693, H) but, as pointed out on a previous 

 page, the position of the pore is by no means constant and in Taxodium the 

 ray pits are fairly large and almost simple. 



Cupressus and Chamaecyparis. By Beissner 3 and many other authors both 

 names are used in a generic sense, though Masters regards Chamaecyparis as 

 a subsection of Cupressus. One distinguishing feature is the presence of more 



Kleeberg (85). 



Gothan (05) p. 47. 



Beissner (91). 



