126 PICEA. 
»ihe three under sides only, gibbous, a little declining, obtusely 
»pointed, soft and flexible. "The upper disk is longitudinally 
marked with a slight channel, of a deep, glossy green; the 
,under of a pale, not glossy green. "lhis tree affords in con- 
,siderable quantities, a fine deep aromatic balsam, resembling 
»the balsam of Canada in taste and appearance. "The small pistils 
»filled, rise like a blister on the trunk and the branches. "The 
»Park, that envelops these pistils, is soft and easily punc- 
,tured: the general appearance of the bark is dark and smooth: 
,but not so remarkable for that quality as the white Pine of 
,O0ur country. 'lhe wood is white and soft.^ Lewis and Clarke. 
ÁÀ. ABIES MICROPHYLLA Raf. Small leaved Fir. ( Fourth Fir Lewis 
,and Clarke), bark rimose, branches not bullate, leaves densely 
,8cattered, forming 3 rows, sessile, sublanceolate, acute. — 
;,Reaching 150 feet high. Like the last, but yielding no bal- 
,sam, and with leaves still niore minute, not lueid above, only 
»1— 12th of an inch long, and 1— 24th wide. Wood white and 
Jtough.*  Aaf. 
The fourth species in size resembles the second. "The stem is 
,simple, branching, ascending and proliferous; the bark is of a 
,reddish dark brown, and thicker than that of the third species, 
divided by small longitudinal interstices, not so much magnified as 
in the second species. The relative position of the leaves resem- 
,hle those of the balsam Fir, exeepting that they are only two- 
»thirds the width, and little more than half the length, and that 
»the upper disk is not so green and glossy. 'lhe wood yields no 
»balsam, and but litile rosin. 'The wood is white and tough, 
,although rather porous.^ Lewis and Clarke. 
5. ,ABIES MUCRONATA Raf. ( Fifth Fir Lewis and Clarke), bark 
»scealy, branehes virgate, leaves scattered very narrow, rigid, 
and oblique, suleate above, pale beneath.  Cones ovate acute, 
Scales rounded, nervose mucronate.— Rises 150 feet, leaves sub- 
;balsamie, one inch long, 1— 20th wide, cones very large, two 
and half inches long.^ — ,Var. palustris. Grows in swamps, 
only 30 feet high , and with spreading branches.* af. 
The fifth species in size resembles the second, and has a 
Jirunk simple, branching and proliferous. "Phe bark is of a thin 
$,dark brown, divided longitudinally by interstices, and sealing 
