34 Spriiig Flora of Ohio. 



A. Chestnut Oaks. Leaves coarsely sinuate-toothed — or sfis^ht/y lohed or 

 rather piniiatifid lit the S7caii!p White Oak. 



Quer'-cus plat-a-noi'-des (Lam.) Sudw. (Q. bicolor Willd.) Swamp 

 White Oak. — L/eaves obovate or oblong-obovate, wedge-shaped at base, 

 coarsely sinuate-crenate, or often rather pinnatifid, usually soft downy 

 and white hoary beneath; fruiting peduncle much longer than the 

 petiole; acorn scarcely 1 inch long, cup fringed or the upper scales 

 pointed. 



Quer'-cus pri'-nus L. Chestnut Oak.— Leaves thick, obovate or ob- 

 long to lanceolate, undulately crenate- toothed, pale and minutely 

 downy beneath ; fruiting peduncle shorter than the petioles ; cup Yz 

 inch wide, mostly tuberculate with hard and stout scales; acorn large,. 

 sometimes 1-1 X inches long. 



Quer'-cus itiuh-len-ber'-gi-i Englm. Yellow Oak.— Leaves slender-peti- 

 oled, often oblong or even lanceolate, usually acute or pointed, mostly 

 obtuse at base, almost equall}' and rather sharply toothed; cup shal- 

 low, thin, of small appressed scales, 5-7 lines broad; acorn globose or 

 obovate, 7-9 lines long, sweet, hence the common name of the species 

 Sweet Oak. 



Quer'-cus pri-noi'-des Willd. Scrub Yellow Oak. — Like the last, but 

 low, usualh' 2-4 feet high, with smaller and more iindulate leaves. 

 Reported for southern Ohio. 



A. Black Oaks, ll'ood porous and brittle, acorns maturing the second year. 

 ,b. Leaves piyinatifid or lobed, not coriaceous^, 



((c. Mature leaves glabrous both sides or nearly jo.)) 



Quer'-cus ru'-bra L. Red Oak. — Cup saucer-shaped or flat, %-\ in. 

 in diameter, acorn oblong-ovoid or ellipsoidal, 1 in. or less in length; 

 leaves moderateh' (rarely deeply) pinnatifid. 



Quer'-cus coc-cin'-e-a Wang. Scarlet Oak. — Cup top -shaped or 

 hemispherical with a conical base, 7-!> lines broad, coarselj^ scaly, 

 covering half or more of the broadly or globular-ovoid acorn, the 

 scales mostly appressed and glabrate, acorn Yz-^/i in. long; leaves 

 deeply pinnatifid, the lobes divergent and sparingly cut-toothed; bark 

 of trunk gray, the interior reddish. 



Quer'-cus ve-lu-ti'-na Lam. (Q. coccinea van tinctoria Gr.) Black 

 Oak ; Quercitron Oak. — Somewhat resembling the preceding, but the 

 leaves with broader undivided lobes, commonly paler and somewhat 



