VIEW OF THE GENUS CUPRESSUS. 319 
The differences in the mode of ramification have been relied 
on to furnish distinctions not only between species but between 
genera. Thus, the species of the section Chamecyparis, the 
Fig. 4. 
Cupressus macrocarpa.—Form with spreading branches ; from an original 
sketch made in California by Sir Joseph Hooker. 
branchlets of which are mostly in one plane, have been called flat 
Cypresses, and generically distinguished from true Cypresses, 
in which the branching of the ultimate shoots is four-ranked. 
But these distinctions are not constant, as a flat-branched 
Chamecyparis with dimorphic leaves sometimes produces four- 
sided shoots, which branch in a decussate manner, and which 
