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species are interesting in the old collection, C. Douglasii from Wash- 
ington and Oregon, and C. rivularis from the region between the 
Rocky Mountains and the Sierra Nevada. Many species in the new 
collection on Peter’s Hill are already large enough to show their char- 
acter and value, especially those in the Intricatae Group. Nearly all 
the species in this group are small shrubs of the northern and middle 
states with large flowers, yellow or rose-colored anthers, and large, 
showy, late-ripening fruits. Long entirely overlooked by American 
botanists, this group contains some of the most beautiful garden plants 
to be found among North American shrubs. Among foreign species the 
earliest to flower in the Arboretum is Crataegus nigra, a tree from 
eastern Europe with large flowers and early-ripening black fruit. There 
is a large specimen in the old collection near the southern end of the 
Willow Collection. The two species of western Europe, C. oxycantha 
and C. monogyna, and many varieties are, of course, established in 
the Arboretum where C. orientalis from southeastern Europe, with 
deeply divided silvery leaves, large flowers and orange and red fruit is 
a plant which deserves the attention of all lovers of hardy trees and 
shrubs. The most beautiful, however, of all the foreign Thorns here 
is C. pinnatifida from eastern Siberia and northern China. The large, 
deeply divided and lustrous leaves make this one of the handsomest 
plants of the whole genus; the flowers are large and abundant, and the 
crimson fruits are produced in profusion. A form of this plant (var. 
major) with larger leaves and much larger fruit, is cultivated in or- 
chards as a fruit tree in the neighborhood of Peking. With the ex- 
ception of a few varieties of the species of western Europe with red, 
rose-colored or pink flowers, all Hawthorns have white flowers; they 
are therefore less showy when in bloom than many of the Crabapples, 
on most of which the flowers are more or less tinged with pink. The 
flowering period, however, is much longer and the fruit is far more 
beautiful than that of any of the Asiatic Crabapples. As flowering 
plants the Hawthorns are certainly less beautiful than some of the 
Japanese Cherries, but Cherry blossoms last only a few days and the 
fruits of the Japanese species have no ornamental value. Like many 
other trees and shrubs of the Rose family, Crataegus suffers from the 
attacks of the San Jose scale, and the leaves of some species are badly 
disfigured by a leaf miner. 
American Crabapples. Several of the American Crabapples are now 
in bloom. Those of the eastern states produce large, pink, very fra- 
grant flowers which do not open until the leaves are partly grown, and 
depressed-globose, fragrant, greenish yellow fruits covered with a 
sticky exudation. The earliest to flower, Malus glaucescens, may be 
seen in the Peter’s Hill group. It is a native of western New York 
and of Ontario, and is a treelike shrub or small tree distinguished from 
the other northern species by the pale lower surface of the leaves and 
the hairy covering on the outer surface of the calyx of the flower. The 
best known of the northern species, M. coronaria , flowers a little later 
and can be seen in the old collection on Forest Hills Road opposite the 
end of the Meadow Road. Here also are M. ioensis from the Mississ- 
ippi Valley and its double-flowered variety known as the Bechtel Crab. 
