180 



BE. MAXWELL T. MASTERs's CONTKTBUTIONS 



Fig. 11. 



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Abies concolor (txue). Foliage and buds of cultivated examples. 



Great difference of opinion exists, as will be apparent from 

 wliat lias "been already said, as to the identity and specific linu- 

 tations of the plants varionsly included under the names grandis^ 

 Gordonianay lasiocarpa^ Lotciana, Parsonsiana, and concolor. 

 For the purpose of this communication, and with a view to 

 facilitate the discrimination of specimens, I have considered the 

 tree found in Colorado, Utah, and South California to represent 

 the true Ahies concolor^ which differs in various particulars, 

 especially in the leaves and buds, from A, grandis, or A, grandts, 



