Tkkks oi TiiK XokriiiiKN L'mtkii Statks 8") 



■_'. Leaves with xery larj^e icctli or lohes. tlir dix isions 

 not serrate or serrate-dentate. 'A. 



'2. Leaves with the large divisions or lobes serrate or 

 serrate-dentate, o. 



•S. Leaves with stipules which are often large and foli- 

 aceous ; leaves green and pubescent beneath at least 

 on the veins; tiowers corymbose, unfolding with 

 the leaves ; wings of fruit diverging a little less than 

 a right angle. ./. nuiriMn. 



•S. Lea\es witliout stipules. 4. 



I. Leaves with much milky sap in the i)etiole. glabrous. 

 dark green above, lighter below, usually with 7 

 prominent palmate veins; flowers corymbose, un- 

 folding with the leaves; wings of the fruit diverg- 

 ing nearly in a straight line; petals present; winter 

 buds rounded. ./. platanoidcs. 



4. Leaves with watery or frothy sap, pale and nearly glalj- 

 rous beneath, usually with 5 prominent palmate 

 veins; flowers corymbose, unfolding with the 

 leaves; wings of the fruit diverging a little less 

 than a right angle; i)etals none; winter buds 

 l)ointed. A. sacchaniui. 



•"). Leaves very s'.iarply and finely serrate, -i-lobed at the 

 outer end. widest abo\c the middle, the lol)es 

 abruptly narrow-acuminate, brown pubescent below 

 when young; twigs green, striped with darker lines; 

 flowers racemed. terminal, unfolding after the leavrs. 

 . /. I^cunsylz-anicuui. 



•"). Leaves dentate-serrate or lobcd. not ai)rni)tl\ narrow- 

 acuminate; twigs not stri])e(l. i>. 



<i. Leaves broadly 'i-'i-lolied, the lobes rather regularly 

 and continuously dentate-serrate ox dentate-crenate ; 

 flowers recemed, terminal, unfolding afli-r the 

 leaves. 7. 



(i. Leaves usualL with •{-7 slender, long antl pointed 

 lobes, the lobes irregularly or interruptedly serrate 

 or serrate-dentate; flowers in dense sessile lateral 

 clusters, appearing liefore the leaves. 8. 



