100 



Lea\'es sinuate dentate, sometinies lolied near the 

 base, ^-ehety to the touch beneath; peduncles 



of fruit longer than the peticles 2 Q. bicolor. 



Lea\"es irregularly lobed, harsh or rarely ^eh'ety or 

 smooth to the touch beneath; peduncles of fruit 

 shorter than the petioles. 

 Cup of fruit fringed; apex of lobes of leaves gener- 

 ally rounded; trees of lowland 7 (^. niacroearj)a 



Cup of fruit not fringed; apex of lobes of leaves 

 generally acute; trees of swamps in the ex- 

 treme southwestern counties of Indiana 8 Q. IjTata. 



Bark dark, light and furr(3\\ed; leases T\dth bristle tips; fruit 

 maturing the second year. 



Leaves entire 9 <^. iuibricaria. 



Lea\es more or less deeply lobed, the lobes and teeth con- 

 spicuously bristle pointed . 

 Mature leaves smooth beneath, except tufts of hairs in 

 the axils. 

 Leaves lobed to about the middle, the lateral lobes 

 broadest at the base; cup saucer-shaped; nut about 

 L5-2 cm. in diameter; terminal l>uds reddish. 10 Q. rubra. 

 Lea^'es lol>ed to beyond the mid'dle, frequentlj' those 

 grown in dense shade not so deeply lobed, some or 

 all of the lateral lobes broadest toward the apex. 

 Cup saucer-shaped, rarel\' enclosing the nut for 

 more than I3 its length; trees of the hnv lands 

 and swani))s. 

 Leaves glossy aljo\-e; lilades usu dlj- 10-12 cm. long; 

 cups usually 1..5 cm. or less broad; terminal 



buds chestnut brown 11 Q. palustris. 



Lea'i-es dull abo^'e, usually about 15 cm. long; cups 

 1..V2..J cm. broad, rarely as narrow as 1.5 cm.; 



terminal buds grayish brown 12 Q. Schneckii. 



Cup l)cmispheric, generally- enclosing the nnt for 

 half its length; trees of the uplands. 

 Timer Ijark jellowish or orange; kernel of nut 

 A'ello\\ish or orange, and vtiry bitter. 

 Terminal buds usuall\' 5 mm. or less in length, 

 ovoid and generally lihmt, reddish-broi\n ; 

 scales of cup closely appressed; trees local 

 in the extreme northwest part of the State. 13 Q. ellipsoidalis. 

 Terminal buds usuallj' longer than 6 mm., usuaU\' 

 angled and sharp-pointed; scales of cup not 

 closely appressed; trees of all parts of the 



State 14 Q. \-elutina. 



Inner bark reddish or gray; kcrncil white and not 



very bitter 15 Q. coceinea. 



^Mature leaves more or less pubescent on the wliole under 

 surface. 



