6 4 



THE BOOK OF NATURE STUDY 



several at the same level, at the upper limit of each annual addition 



in length to the main 

 stem or branch. 

 This position of the 

 branches on the 

 main trunk is best 

 seen in a young tree, 

 and leads to the 

 regular conical out- 

 line of this. 



The Pine bears 

 two kinds of flowers, 

 staminate or male, 

 and the female 

 cones ; these occur 

 on the same tree and 

 often on the same 

 branch. These 

 flowers are borne on 

 the new growth of 

 the season, and are 



FlG. 17. Scots Pine, i, Branch showing the growth of last year and of the current 

 season ; the small cones at the tip are ready for pollination, those below were 

 pollinated a year ago ; 2, male flower enlarged ; 3, female flower or cone at the 

 time of pollination, enlarged ; 3A, single ovuliferous scale showing the position 

 of the two ovules ; 4, mature cone opening to let the seeds escape ; 5, seed, cut 

 through to show the embryo plant. (After Schumann.) 



