20 
Thorn— Leaves simple. Fruit fleshy, globular, rarely more 
than % inch thick. Seeds 1 to 5, each inclosed in a bony 
seed-like stone. Many species are recognized. Mostly 
thorny shrubs, but the following occasionally become 
small trees. Mature fruit is generally essential for identi¬ 
fication. 
147 Leaves deeply cut into several sparingly toothed segments. 
Fruit with one stone. Cult, and escaped—English Haw¬ 
thorn, Crataegus O.vydcantha L. 
147 Leaves not deeply cut, indentations reaching less than 
half way to the midrib. Fruit with 2 or more stones—14,8 
148 Stones 2 or 8, each with 2 prominent depressions on inner 
side. Leaves leathery, shining above— Crataegus macra- 
cantha Lodd. 
148 Stones without deep depressions on the inner side—149 
149 Flowers and fruits generally 8 to 7 in a cluster. Leaf-stalks 
with glands. Southern N. E.—Scarlet Thorn, Scarlet 
Haw, Red Haw, White Thorn, Crataegus coccinea L. 
149 Flowers generally more than 7 in a cluster—150 
150 Leaves broadest above the middle—Ccck-spur Thorn, Red 
Haw, Newcastle Thorn, Thorn Plum, Crataegus Crus-galli 
L. 
150 Leaves broadest at the middle or Mow—151 
151 Mature leaves smooth—152 
151 Mature leaves hairy, at least along the veins beneath—156 
152 Leaves broadest at the middle. Vt —Crataegus Oakesiand 
Eggleston. 
152 Leaves broadest toward the base—158 
153 Fruit firm when ripe. Leaves bluish green. Western 
N. E.— Crataegus prufnosa (Wendl.) C. Koch. 
158 Fruit soft when ripe—154 
154 Calyx lobes finely toothed. Stones usually 4 or 5 —155 
154 Calyx lobes not toothed. Stones usually 3 or 4— Crataegus 
macrosperma Ashe. 
155 Upper surface of mature leaves smooth. Western N. E. 
— Crataegus coccinioides var. dilatata (Sarg.) Eggleston. ' 
