CHAP. CV. CORYLA‘CEAZ., QUE’/RCUS. 1863 
Statistics. Inthe environs of London, at Syon, it is 22ft. high, diameter of the trunk 1 ft., and of 
the head 24ft.: in Denbighshire, at Llanbede Hall, 20 years planted, it is 35 ft. high, the girt of 
the trunk 2 ft. 8in., and the diameter of the head 14 ft.: in Suffolk, at Finborough Hall, 30 years 
planted, it is 40 ft. high, the diameter of the trunk 1 ft. 8in., and of the head S30 ft. In Ireland, in 
Louth, at Oriel Temple, 60 years planted, it is 55 ft. high. In France, at Toulon, in the Botanic 
Garden, 10 years old, it is 19 ft. high. In Bavaria, at Munich, in the English Garden, 30 years old, 
it is 10 ft. high, the diameter of the trunk 3in., and of the head4ft. In Italy, at Monza, 24 years old, 
it is 23 ft. high, the diameter of the trunk 6in., and of the head 18 ft. 
Commercial Statistics. Plants, in the London nurseries, are 7s. 6d. each; of 
the pendulous-branched variety, 3s. 6d. each: at Bollwyller, plants are 3 francs 
each. 
Q. Tiérneri, Q. australis, and some other sorts, may possibly belong to the 
section Cérris; but, as there are great doubts on the subject, we have thought 
it better to include them in an Appendix. 
§ iii. Alba. White American Oaks. 
Sect. Char. Leaves lobed, and sinuated, not mucronated; broadest at the 
upper extremity ; dying off more or less shaded with a violet colour. Bark 
white, or whitish brown, cracking and scaling off in thin lamine. Fructifi- 
cation annual. Cups imbricate or echinate. Nut oblong, generally large. 
The American oaks being generally propagated in Europe by acorns im- 
ported from America, we shall here give a comparative view of the acorns of 
some of the common kinds, _ Fig. 1722. represents acorns of the natural size, 
of all the kinds that were imported by Mr. Charlwood, seedsman, of London, 
in the year 1836; but that year being unfavourable for the ripening of acorns 
in America, fewer sorts were imported than usual, and the nuts of these few 
are under the average size. In this figure, a is the acorn of Quércus alba; 
6, that of Q. macrocarpa, with the cup on; c, that of Q. obtusiloba; d, Q. 
Prinus tomentosa ; e, Q. P. pumila; f, Q. tinctoria ; g, Q. nigra; h, Q. Phéllos; 
and i, Q. palastris. 
We may here observe that most sorts of the American oak in Messrs. 
Loddiges’s collection (the most complete in Europe) can be propagated by 
grafting on the common oak, close to the ground; and largely earthing up 
the grafts afterwards, so as to leave only the points of the scions exposed to 
the air. This earthing up not only preserves a uniform degree of moisture 
round the graft; but the earth employed being taken from the adjoining sur- 
face, and consequently having been heated by the sun, produces an imme- 
diate increase of temperature round the graft, which gives an impulse to the 
rising sap, and so accelerates vegetation. 
It may be proper to notice that the specimens of American oaks in the 
Horticultural Society's Garden are in general stunted, and by no means ex- 
hibit the average growth of such trees in the cliinate of London. The reason 
