FIG. 227. A group of gyinnusperm cones, of which all except B are seed cones 



A, spruce (Picea exceUa), one half natural size ; li, spruce, branch and staminate 

 cones almost natural size ; f', Douglas fir, or Douglas spruce (Pseudotsuga taxifolia), 

 one fourth natural size; D, arhor vitse (Thuja occidentalia), almost natural size 



