176 CALIFORNIA ACADEMY OF SCIENCES. 



Plate XVIII. 



Fig. 1. Staminate anient with bracts at base and the staminate scales 

 attached to the axis. 



Figs. 2 and 3. Pistillate aments to show variation in the scales. 



Figs. 4 and 6. Pistillate scales, back view. 



Fig. 5. Same, showing the naked ovnles; the number is variable. The 

 micropyle which receives the pollen can be seen at the top of the naked 

 ovules. The long point on these scales becomes the inconspicuous bristle 

 of the ripe cone. 



Fig. 7. A bract of a pistillate ament. 



Fig. 8. Scale of staminate ament, showing the stem that unites the 

 scale to the axis, the pollen sacs, one of which is ripe and discharging 

 pollen. The number is variable, but generally three. 



Fig. 8c shows some pollen grains magnified. 



Figs. 9, 10, 11, 12 are seeds and show two types of the variable seeds. 



