ACERACEAE (MAPLE FAMILY) 



3 a Shrub prostrate, about i ft. high; leaves obovate, 1-2 



in. long RUNNING STRAWBERRY BUSH. (E. obovatus.) 



b Shrubs not completely as in a 4 



4 a Capsules warty; leaves thick, dark green; flowers green- 



ish; wild shrub STRAWBERRY BUSH. (E. americanus.) 



b Capsules smooth ; wild or cultivated shrubs 5 



5 a Flowers greenish-yellow, 3-7 together; cultivated shrub; 



leaves usually oblong. .. .SPINDLE-TREE. (E. europatus.*) 

 b Flowers purple, 5-15 together; usually wild shrub; 



leaves usually ovate. .BUR_NING BUSH. (E. atropurphreus.) 

 2 CELASTRUS CLIMBING BITTERSWEET. (C. scdndem.) 



7 STAPHYLEACEAE. Eladdernut Family. 

 i STAPHYLfcA. 

 i a Leaflets 3 ; wild species 



AMERICAN BLADDERNUT. (S. trifblia.) 

 b Leaflets 5-7 ; cultivated species 



EUROPEAN BLADDERNUT. (S. pinnata*) 



8 ACERACEAE. Maple Family. 

 i ACER. 



1 a Leaves pinnately compound .... Box ELDER. (A. negundo.) 

 b Leaves simple 2 



2 a Leaves sharply toothed, not lobed, the teeth about ^4 



in. long HORNBEAN MAPLE. (A. carpinifblium*) 



b Leaves more or less lobed 3 



3 a Leaves very deeply 7-n-lobed, the lobes narrow, often 



cleft, the sinuses extending nearly to the petiole 



JAPANESE MAPLE. (A. palmatum*) 

 b Leaves not completely as in a 4 



4 a Leaves nearly circular in outline, 5-9-lobed, the lobes 



doubly toothed; cultivated species 



ROUND-LEAVED MAPLE. (A. circinatum.*) 

 b Leaves not completely as in a 5 



5 a Leaves 3-lobed only toward the apex, margin finely 



toothed all around ; bark smooth, green, striped 



STRIPED MAPLE. (A. pennsylvdnicum.) 

 b Leaves and bark not completely as in a 6 



6 a Leaves with sinuses extending more than half way to 



the petiole, whitish beneath ; bark peeling off in thin 



patches or flakes SILVER MAPLE. (A. saccharinum.) 



b Leaves and bark not completely as in a 7 



7 a Leaves 3-7-lobed, the lobes entire or the middle one 



sometimes slightly toothed 8 



b Leaves with lobes more or less toothed or lobed 9 



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