Description of Native Trees 
134. Hop-tree. Wafer Ash. Shrubby Trefoil. (Ptelea 
trifoliata. ) 
LEAF : 3-5’, trifoliate, alternate ; leaflets, 3, entire, ovate or 
long-ovate, apex pointed, base of the terminal one tapering. 
FLOWER : small, greenish-white, in compound clusters, ill-scented ; 
June. Fruit: roundish, winged all around, often white and 
ornamental in September. RANGE: Pennsylvania to Wisconsin, 
and south ; low tree and shrub. (Pl. XI.) 
135. Cockspur Thorn. (Cratzegus crus-galli.) 
LEAF: 2-3, simple, alternate, serrate toward apex, obovate, 
base wedge-shaped tapering to a point, stemless, thick, glossy. 
FLOWER: white, 5-petalled, clustered; June. FRuIT: globular, 
red, % diameter; thorns long; lowtree and shrub. (Pl. IX.) 
136. White Thorn. Scarlet-fruited Thorn. (Crategus 
coccinea. ) 
LEAF: 2'-5’, simple, alternate, doubly serrate, or with small 
lobes, round-ovate, stem slender; entirely smooth. FLOWER: 
white or rosy-tinged, in large clusters; May. FRuvirT: bright red, 
ovoid, %’ across, hardly edible ; low tree and shrub ; thorny. 
(Pl. IX.) 
137. Black Thorn. Pear Thorn. (Crategus tomentosa.) 
LEAF: 3-5’, simple, alternate, doubly serrate or even some- 
what lobed, oval to ovate, stem somewhat margined ; ¢hickish, 
and apt to be downy beneath. FLOWER: white, clustered ; 
May, June. Fruit: orange or scarlet, 1%’ diameter; low tree 
and shrub; thorny. (Pl. IX.) 
138. Dotted Haw. (Cratzegus punctata.) 
LEAF: 2'-3', simple, alternate, unequally serrate toward apex, 
obovate, base strongly wedge-shaped and entire, tapering into 
winged stems, thickish. FLOWER: white, clustered ; May, June.- 
FruitT: yellowish-red, whitish-dotted ; low tree and shrub ; thorny. 
139. Downy-leaved Hawthorn. (Crategus mollis.) 
LEAF: essentially as in 137 (of which it is probably a variety), 
but rounder, and downy when young ; fruit larger. Illinois and 
Michigan ; low tree and shrub ; thorny. 
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