EXPLANATION OF PLATE XX. 



Fig. a, brunch bearing two sul>terminal aments of female flowers Jit end of shoot of the season; 6, immature 

 cone of one season's growth; c, mature closed cone of two seasons' growth; il, mature open rone alter shedding 

 seed; e, cone scale, outer or dorsal side, showing the broad umbonate apophysU end with its sharp transverse 

 ridges and the stout rerlexed prickle; /, inner or ventral view of the same with the seed in place; g, seed and wing 

 detached. 



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