CHAP. CV. CORYLA CEA. QUE‘’RCUS. 1743 
1583 
of lin. to 39ft.; and to fig. 
1585. and fig. 1586., portraits of 
two of the largest trees of Q. 
sessiliflora in the same park, 
drawn to the same scale, and by 
the same artist. The difference 
in aspect, however, both when 
the trees are clothed, and when 
they have lost their leaves is considerable. The difference in the leaves 
will be rendered obvious by comparing jig. 1583., which represents Q. pe- 
dunculata, with fig.1584., which represents Q. sessiliflora. The branches 
and spray of Q. sessiliflora are somewhat less tortuous and gnarled than 
those of Q. pedunculata; the bark is whiter, the shoots of the year rather 
thicker, and the buds decidedly larger. . pedunculata comes rather earlier 
into leaf than Q. sessilifléra: the flowers appearing in the former in the 
beginning of May, and the fruit ripening in the beginning of October; while 
in the latter the flowers appear in the middle of May, and the fruit ripens 
in November. The leaves of Q. sessilifldra are said by some to be more fre- 
quently retained on the tree through the winter than those of Q. pedunculata ; 
and hence, it is alleged, the German name of winter eiche for the former, and 
sommer eiche for the latter: but Willdenow truly observes that trees may 
frequently be found among both species which retain their leaves, in a withered 
state, during the winter. The taproots in both, when young, and in good, 
deep, loamy or sandy, soil, have been traced to a depth nearly as great as the 
height of the tree. (Hanbury and Marshall.) The lateral roots do not run 
so near the surface of the ground as those of many other kinds of trees, 
unless the soil is thin and bad. They may sometimes be found several feet 
under ground, attaining a great thickness, and extending to a much greater 
length than the branches. The roots of the British oaks never throw up 
suckers. The rate of growth of the two species does not appear to be very 
5x 
