868 ARBORETUM ET FRUTICETUM BRITANNICUM. 



somewhat elongated, similarly rounded at both ends, and very sweet. 

 Highly ornamental when in full bloom, and most prolific in acorns 

 even when only 3 or 4 feet high. 



t Q. P. 5 tomentosa Michx. Quer. No. 5. t. 9 f. 2. Q. P. discolor 

 Michx. N. Amer. Syl.'i. p. 43. t.7. (our Jig. 1580.); Q. bicolor 

 Willd. Sp. PI. iv. p. 440. ; Q,. Michauxz Nutt. ; the Swamp white 

 Oak. Leaves almost sessile, obtusely oval, bluntly toothed ; downy 

 beneath. (Michx.) A large deciduous tree. United States gene- 

 rally. Height 60 ft. to 70 ft. In- 

 troduced in 1800. The leaves are 

 from 6 in. to 8 in. long, and 4 in. 

 broad ; entire towards the base, 

 which is attenuated and wedge- 

 shaped ; but dilated and coarsely 

 toothed for two thirds of their 

 length. The tree is distinguished, 

 when full grown, by the remarkable 

 appearance of its leaves ; which are 

 on the under side silky and of a 

 silvery whiteness, while the upper 

 side is smooth and of a bright 

 green. The acorns (fig* 1566. d) are 

 long, of a clear chestnut brown, and 

 contained in rather shallow scaly 

 cups, edged with short slender fila- 

 ments. These cups are more downy 



within than those of any other oak; and they are borne in pairs, on 

 peduncles of from 1 in. to 2 in. in length. The bark is scaly, as in 

 all the preceding varieties, and of a greenish white. 



v. Rubr&. Red American Oaks. 



Sect. Char. Leaves deeply lobed, sinuated, multifid, and mucronated. Bark 

 dark, and not scaling off. Fructification biennial. Nut ovate, with a per- 

 sistent style. Cup imbricate, large in proportion to the nut. Trees, varying 

 from 80 or 90 feet to 15 or 20 feet in height ; remarkable for the bright 

 red, deep scarlet, or dark purple, of their foliage, when it dies off in autumn. 

 Perhaps most of the kinds in this section might be reduced to two or three 

 species ; but, as they come up tolerably true from seed, we have, for the 

 cultivator, considered it more convenient to treat them as distinct. The 

 hardiest and most rapid-growing, and at the same time the most elegant and 

 ornamental, tree of the section is Q. palustris, which, with its spreading 

 drooping branches, and its straight erect trunk and spiry top, is, indepen- 

 dently of its lively scarlet, orange, and red colours in spring and autumn, in 

 our opinion the most graceful of all oaks, either European or American. 



14. Q. RU V BRA L. The red, or Champion, Oak. 



Identification. Lin. Sp. PL, 1413. ; Pursh Fl. Araer. Sept., 2. p. 630. ; Michx. Quer., No. 20. 

 Synonyme. Q. 'sculi divisurS, &c., Pluk. Phyt. t. 54. f. 4. 



Engravings. Pluk. Phyt., t. 54. f. 4. ; Michx. N. Amer. Syl., 2. t. 28. ; the plates of this species in 

 Arb. Brit., 1st edit., vol. viii. ; and our^s. 1581. and 1582. 



Spec. Char., fyc. Leaves smooth, oblong, sinuated, on long stalks : lobes acute, 

 sharply toothed, bristle-pointed. Calyx of the fruit flat underneath. 

 Nut ovate. (Willd.) A large deciduous tree. Canada and the whole of 

 the North of the United States. Height 80ft. to 90 ft. Introduced in 

 1739. Flowers greenish white ; May. Acorns brown, occasionally 

 ripened in England in October. 



Varieties. Aiton, in the Hortus Kewensis, 2d ed., mentions two forms of this 

 species : Q. rubra latifolia, the champion oak, which is the Q. rubra of 

 Linnseus ; and Q. rubra montana, the mountain red oak. 



