400 



BOTANY. 



Fig. 29G). These structures, which may be called carpel- 

 lary leaves, show their relationship to ordinary foliage leaves 



Fig. 2%. A pinnate, open carpellary leaf of Cycas revoluta (reduced one half). /, 

 nnaltered pinnae; nk, young ovules replacing the lower pinna; ; xk', fully developed 

 ovule. After Sachs. 



in having pinnae toward their summits (/, Fig. 296). 



The examples given will illustrate the general structure of 



lojrues of the " scales " of Abies. Either interpretation would necessi- 

 tate a conniderable change in the systematic arrangement of Taxinew. 



