206 COMMON CANADIAN WILD PLAMTS. 



* * Acorns ripening tlie second year^ and therefore horne on tlie previous 

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

 leaves bristle-pointed. 



5. Q. coecin'ea, "Wang. (Scaklbt Oak.) a large tree. 

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

 rounded at the base, deeply pinnatifid, the lobes divergent 

 and sparingly cut-toothed. Bark gray outside, reddish 

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

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

 acorn. 



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

 Catalogue.) (Quercitkon. Ybllow-babkkd or Black Oak.) 

 Leaves usually less deeply pinnatifid, slender-petioled, rather 

 rounded at the base, rusty-downy when young, smooth and 

 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 

 yellow or orange inside. — Western OntaHo ; mostly in dry 

 soil, but occasionally in moist places. 



Var. ambig'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 tl^^ oblong-ovoid acorn. — Rich and poor soil. 



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

 tree. Cup flat-saucer-shaped, very mucli 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. 



2. CASTA'iVEA, Tourn. Chestnut. 



C. vesea. L. , var. Ameriea'na, Michx. {C. vulgaris, var. 



Americana, A. DC, in Macouu's Catalogue.) (Chestnot.) 



~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. 



