20 
BULLETIN 152, U. S. DEPARTMENT OF AGBICULTUEE. 
f 
Fife. Z.— Tsuga canadensis, a, Seedling a few days old; 6, seedling, one month old; c, seedling, one year 
old; d, mature foliage and ripe cones; e, lower side of detached cone scale; /, upper side of cone scale 
with its seeds and views of latter detached; g, lower side of seed showing resin glands (twice natural 
size). 
