KEY TO THE SPECIES OF BUCKEYE 



1. Winter buds thickly coated with resin; flowers white to pink (often 

 red in A. cornea). 

 2. Leaflets usually 7 (rarely 5), sessile or nearly so; fruit 2-2 >^ inches 



long, with short spines; widely planted and naturalized 



Aesculus hippocastanum L., Horsechestnut 



2. Leaflets usually 5, leaflets on stalks H-1 inch long; fruit 2-3 inches 



long, smooth; California 



A. calif ornica (Spach) Nutt., California Buckeye 



1. Winter buds not resinous, or slightly so; flowers yellow to scarlet; 

 leaflets stalked; eastern. 



3. Fruit spiny, 1-2 inches long; flowers yellow-green. 



4. Leaflets 5 (rarely 7); small to medium-sized tree; Pennsylvania 



and Michigan to Nebraska and south 



A. glabra Willd., Ohio Buckeye p. 311. 



4. Leaflets 7-9; shrub or rarely small tree; southern Oklahoma 

 and east Texas A. arguta Buckl., Texas Buckeye 



3. Fruit nearly smooth, not spiny. 



5. Leaflets 5-7; flowers yellow with glandular-hairy calyx; fruit 

 2-3 inches long; large tree; Pennsylvania to Illinois and south 

 A. octandra Marsh., Yellow Buckeye, p. 311. 



5. Leaflets 5; flowers red to red-yellow, calyx not glandular-hairy; 



fruit 1—2 inches long; shrubs or small trees. 



6. Petals hairless but glandular on margin; Virginia to Ken- 

 tucky and south A. pavia L., Red Buckeye 



6. Petals hairy but not glandular on margin; North Carolina 



to Florida and Alabama 



A. sylvatica Bartr., Painted Buckeye 



ANACARDIACEAE 



American Smoketree 

 Cotinus obovatus Raf. 



This handsome shrub or small tree ranges from Tennessee 

 to Missouri and Oklahoma and south. It is characterized by 

 simple, alternate, deciduous leaves 4—6 inches long, which are 

 oval to obovate, entire, and dark green; by dioecious, clustered 

 flowers, many being abortive and hairy giving the tree its name; 

 and by a dry, oblong, brown, hairy drupe about |4 inch long 

 borne on stems 1-3 inches long. 



* * * 



Texas Pistache 



Pistacia texana Swingle 



This shrub or small tree extends into southern Texas from 

 Mexico. It is characterized by alternate, persistent, pinnately 

 compound leaves with 9-19 spatulate leaflets; small dioecious 

 flowers without petals or calyx; and an oval, red-brown drupe 

 H inch long. 



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