206 COMMON CANADIAN WILD PLANTS. 



'■ Acorns ripening the second year, and there/ore borne on the previous 

 year's wood, below the leaves of the season. Lobes or teeth of the 

 leaves bristle-pointed. 



5. Q. eoeein'ea, Wang. (Scarlet Oak.) A large tree. 

 Leaves briglit green, shining above, turning red in autumn, 

 rounded at the base, deeply pinnatifid, the lobes divergent 

 and sparingly out-toothed. Bark gray outside, reddish 

 inside. Cup top-shaped or hemispherical, with a more or 

 less conical base, covering half or more of the rather small 

 acorn. 



Var. tinetO'ria, Gray. {Q. tinctoria, Bartram, inMacoun's 

 Catalogue.) (Quercitron. Tehow-baekbd or Black Oak.) 

 Leaves usually less deeply pinnatifid, slender-petioled, rather 

 rounded at the base, rusty-downy when young, smoothand 

 shining above when mature, often slightly pubescent be- 

 neath, turning brownish, orange, or dull red in autumn. 

 Cup as in the species, but the bark darker and rougher and 

 yelloiv or orange inside. — Western Ontario ; mostly in dry 

 soil, but occasionally in moist places. 



Var. amblg'ua. Gray. Leaves closely resembling those 

 of Q. rubra, but the fruit is that of Q. coccinea. — Belleisle 

 Bay, King's Co., N.B. 



6. Q. rubra, L. (Red Oak.) A large tree. Leaves 

 moderately pinnatifid, turning dark-red in the autumn. 

 Cup saucer-shaped, sessile or nearly so, very much shorter 

 than the oblong-ovoid acorn. — Eich and poor soil. 



7. Q. palustris, Du Eoi. (Pin Oak.) A medium-sized 

 tree. Cup flat-saucer-shaped, very much shorter than the 

 ovoid-globose acorn, which is about half an inch long. 

 Leaves deeply pinnatifid, with divergent lobes and rounded 

 sinuses. — Niagara district and south-westward. 



a. CASTA'NEA, Tourn. Chestnut. 

 C. vesea, L. , var. Americana, Michx. (C. vulgaris, var. 

 Americana, A. DC, in Macoun's Catalogue.) (Chestnut.) 

 A large tree. Leaves oblong-lanceolate, pointed, coarsely 

 and sharply serrate, acute at the base. Nuts 2 or 3 in each 

 bur. — South-western Ontario. 



