BOTAMCAL GAZETTE 



Fig. 43. — Semi-diagrammatic longitudinal section through primary shoot with 

 secondary shoot and portion of mature ovule, X 17; outlines of primary and secondary 

 shoots and aril of ovule made with camera lucida, ovule inserted diagrammatically; 

 outlines of vascular supply also made with camera; note young ovule of next season 

 above primary axis tip (pr); 1,2,3, traces to 1st, 2d, and 3d pairs of scales, second 

 pair of which shown in section; /, fertile scale of primary shoot; whole vascular cylinder 

 of secondary shoot shown in black, light portions showing gaps in cylinder formed by 

 scale bundles; in base of aril and seed, relation of xylem and phloem shown as seen in 

 long section, xylem black, phloem white; scattered tracheids described are shown by 

 area of black dots; curved line at base of seed shows line of separation when seed is 

 removed from aril, and limit of camera outline of slide from which drawing was made; 

 figures at ends of dotted lines across vascular tract indicate cross-section drawings 

 corresponding to these levels. 



