THE 



AMERICAN NATURALIST. 



Vol. XXXVIII. 



THE ANATOMY OF 11 1 1'. COM I'l-KA [ .l^s. 



Distribution and Taxonomic \ 'aluv. 



Praxtl (44, p. 37) states that resin pa.sa.^c. 

 wood of "most Abietinccc, namely, INcudoi.su-a, 

 Pinus and Abies Jinna." This statement requne 

 cation in detail, especially with respect to the la>i 

 a 1 rl to make the result.s ot the jMesent ^ 

 will be expedient to di.cu^s sepamtelx the elixir 

 resin cysts and the resin passaj^^e.s. 



The first species to which our atlentinn max 

 Tsui^ra vicrtcnsiana. This is the onl) species <.l 

 which definite resin cysts are to be found. Such 

 never numerous, and thev take the 1 



tiguous cysts in the initial laye 



growth rings. Longitudinally they have i 

 they appear to be extended for great dis 



