Key to the Families. 



Leaves linear or scale-like Pikace.e 19 



Leaves not as above. 

 A. Leaves compound. 



Leaves palmately conipound Aesculack.e 251 



Leaves pinnately compound. 



Leaves -nathout an odd leaflet at the end C'aesalpikace.e. . . . 22(3 



Leaves with an odd leaflet at the end. 

 Leaves alternate. 



Leaflets toothed aU around .Juglaxdace.e 52 



Leaflets entire, or with 1-4 teeth near the base. 

 Trees with thorns, leaflets entire, generally 



less than 4 cm. {lyi inches) long Fabace.e 233 



Trees without thorns, leaflets entire or with 

 1-4 teeth near the base, generally longer 



than 4 cm. (1 J o inches) Shiarubace.e 237 



Leaves opposite. 



Leaflets 3-5, fruit in pairs Aceeace.e 239 



Leaflets 5-11, fruit single Oeeace.e 267 



A. Lea^•es simple. 



Leaves opposite or whorled. 



Petioles more than 4 om. {Ijo inches) long. 



Blades palmately 3-5 lobed Aceeace.e 239 



Bhides entire or with 1 or 2 lateral lobes Bignoniace.e 2S4 



Petioles less than 4 cm. {l}i inches) long. 



Flowers 4-parted, stone of fruit round C'orxace.e 259 



Flowers 5-parted, stone of fruit flattened C'aprifoliace.e .... 2S8 



Lea"\'es alternate. 

 B. Leaves entire. 



Trees "ndth thorns and a niilkj' sap Macluk.v ik 



MORACE.E 155 



Trees without thorns, sap not milkj'. 

 Leaves 3-5 nerved at the base . 



Leaves 3-nerved at the base Celtis in' 



Ulmace.e 14(3 



Leaves 5-nerved at the base Cercis in 



C.IESALPIXACE.E. . 227 



Leaves with 1 primarj- nerve. 



Leaves usually more than 1.5 dm. (6 inches) 

 long, flowers solitary. 



Flo\^■ers appearing before or with the lea^'es . Axoxace.b 1(31 



Flowers appearing after the leaves Mao noli ace.e. . . 155 



(17) 



