152 



CONIFERALES (RECENT) 



seeds. Callitris. Similar in habit to Tetraclinis (fig. 703, B) : in some forms 

 (C. arborea) the small leaves are closely appressed to the axis ; C. glauca 1 shows 

 a considerable range in the form of the leaves, and in C. rhomboidalis the 



FIG. 702 A. Sequoia gigantea. Shoot with cones. (Nat. size.) 



shoots are especially slender. Saxton 2 points out that the tracheids have a 

 single row of separate pits and draws attention to the occurrence of horizontal 



1 Baker and Smith (10) p. 118. 



2 Saxton (10 2 ); (10 3 ). The wood of the Callitrineae requires more thorough 

 investigation. 



