152 



CONIFEEALBS (RECENT) 



[CH. 



seeds. CalUtris. Similar in habit to Tetradinis (fig. 703, B) : in some forms 

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

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



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



shoots are especially slender. Saxton- 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^); (10^). The wood of the CalUtrineae requires more thorough 

 investigation. 



