EXPLANATION OF PLATE XX. 



Fig. a, brancli bearinj;' two subterminal aments of female flowers at end of shoot of the season ; /), immature 

 cone of one season's growth; c, mature closed cone of two seasons' growth; d, mature open cone after shedding 

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

 ridges and the stout reflexed priclile; /, inner or ventral view of the same with the seed in place; //, seed and wing 

 Jetached. 



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