GENERAL MORPHOLOGY OF PLANTS 



B. C. D. E. 



Fig. 355- 



White pine, showing details of mature scales and seed. A. Sterile scale, seeds undeveloped. 

 B. Scale with well-developed seeds, c. Seeds have split off from scale. D. Back of scale 

 with small cover scale. E. Winged seed free from scale. 



Fig. 356. 



Branch of white pine, showing young female cones at time of pollination on the ends of the 

 branches, and one-year-old cones below, near the time of fertilization. 



