12 



FIG. 43. 



Fig. 42. fc>cotch Pine (Pinus sylvestris). 1. A twig bearing pistillate flowers in u deflected 

 spike cone. 2. A twig bearing statninate flowers, in short oval catkins, clustered about the 

 tip. 3. Cone further advanced and with scales closed. 4. Cone matured and with scales 

 open. 5. Cone at the period of blossoming, as in 1, but enlarged. 6, 7. Bract and scale from 

 same, showing outer face and side. 8. hame, showing inner face, with its two attached 

 ovules. 9. A scale from matured cone, inner face, showing attached sesds. 10. Same, outer 

 face, showing its thickened nature. 11, 12. Seed with its wing, natural size and enlarged. 13. 

 Stammate catkin, somewhat enlarged. 14, 15. Isolated stamens from same, enlarged. 16, 17, 

 Pollen grains enlarged. 18. A young shoot, showing its whorl of seed leaves. 19. Fascicle of 

 two leaves. 20. Transverse section of a pair of leaves, showing cellular structure and resini- 

 ferous canals. (From Hough's Elements of Forestry.) 



