PINUS 



% %/ ^@7 



H ALBICAULI5. - P, FLEXILIS. R ARIST/iTA, 



\ 



d\ 



fe-S-3 tsb:^^ L^-^-^ 



P. MONOPHYLLA. R MURMUm, R F0NDER05A, 



/3 />A^ 



MOI\IOPHriLA. P ^ 9 



(1-LEAVED.) V.^.^-^ 



0, 



\^y''pomERos/i. 

 •"^ (3- leaved) 



(p, (feel q) (o (S») O7 (d r®i iy 



Abies Abies Pseudot^uga 



CONCOLOR. LASIOCARPA. TAXIFOLIA. 





P/CEA s^ — y 



ENQELMMNII. ^\^ 



^,^/ PUNGENS. 



Fig. I. Cross-sections of the leaves of some Rocky Mountain conifers. 



