424 A TEXTBOOK OF GENERAL BOTANY 


"EDS 
Fig. 479. Pine (Pinus insularis) 
Center, a branch bearing cones of three different years. The small ones at the 
tip have recently been pollinated, the next in age is about a year old, while the 
oldest has opened to shed its seeds (x 1). Upper left, a cone at the age of pol- 
lination. Note that the sporophylls are separated so that the pollen can enter 
between them (x 84). Lower right, young scale, first as seen from below, 
showing bract, and then as seen from above, showing two ovules (x 6) 
(Fig. 479), so that microspores can reach the megasporangia. 
After pollination the short stem bearing the female cone bends 
downward so that the cone hangs vertically, and in this position 
it remains during the remainder of its existence (Fig. 479), 
Ee 

