Moncecia. 
151 
indentations acute, lobes obtuse, and peduncles length* 
ened. Common in woods. 
The oak in a favourable situation attains a prodigi- 
ous size. The trunk of an oak in Shropshire, mention- 
ed by Lightfoot, measured in circumference 68 feet, or 
nearly 23 feet in diameter ; and another in Yorkshire 
measured 48 feet in circumference, or 16 feet in dia- 
meter. 
Various other species of oak are natives of the south 
of Europe and of North America. 
Quer. , Su&er, grows abundantly in Italy, the south, 
of France, Spain, and Portugal, and furnishes the well- 
known substance cork, of so much importance in do- 
mestic economy. The Cork-tree is an evergreen, with 
ovate, oblong, undivided, serrated leaves, slightly downy 
underneath. Cork is a singular substance, which is 
produced on the cuticle. 
Quer. Cerris, Gall Oak ; with smooth, oval, serra- 
ted leaves. This tree, which is a native of Asia Minor, 
from the Bosphorus to Syria, and from the shores of 
the Archipelago to the frontiers of Persia, seldom at- 
tains the height of more than six feet, and more fre- 
quently appears in the form of a shrub. The galls are 
produced on the shoots of the young branches, and the 
best are those which are collected before the escape of 
the insect, to which their production is owing. Those 
which are perforated are less fit for the purpose of dye- 
stuff, and are known in commerce by the name of white 
galls ; but the black or green galls wre heavier, and 
therefore more valuable. 
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