a 1) c- d e 27 



C 2 MAIN BIBS SEVERAL PALMATELY VEINED; 



d Leaves alternate with 



e 5-7 deep lobes star-shaped; fr. globose head of capsules. 



SWEET GUM (Liquidaribar Styraciflua). 

 e 2 3-5 short lobes; b. of leaf-stem enveloping the new leaf-bud; fr. globose head 



of akenes SYCAMORE (Platanus occidentalis) 



es Not lobed, entire, orbicular-cordate; fr. pod. 



REDBUD ( Cercis Canadensis ) . 



d 2 Leaves opposite; fr. samaras in pairs united at base. 

 e Large or medium-size trees with rather firm Ivs. ; 



f Sinuses rounded at bottom and lobes entire or nearly so ; sinuses 

 g Moderately deep; Ivs. pale and glabrous bn., without stipules. 



SUGAR MAPLE ( Acer Saccharum ) . 

 g 2 Shallow; Ivs. green and pubescent bn., edges drooping; stipules often 



present BLACK MAPLE (A. nigrum) . 



f 2 Sinuses pointed at bottom and lobes more or less toothed; Ivs. 



g Deeply 5-lobed with narrow sinuses SILVER MAPLE (A. dasycarpum ) . 



g 2 Moderately 3-5-lobed with wide sinuses; under surface pale and 



h Glabrate; rather thin, subcordate b RED MAPLE (A. rubrum). 



h 2 Moderately hairy, especially along the veins, firm, mostly tapering 

 and entire b. obovate-orbicular, small and sometimes without lobes. 



CAROLINA MAPLE (A. Carolinum). 

 h3 Velvety pubescent, thick, wide-orbicular; a southern tree. 



DRUMMOND MAPLE (A. Drummondii)* 



