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of the shape and color of that of its Oregon parent but of about twice 
the size. The leaves are less pubescent than those of the common 
Apple, and the flowers are rather larger. This hybrid blooms at about 
the same time as M. ioensis and a few days earlier than M. fusca. 
Crataegus pruinosa has been covered with flowers during the past 
week. This is the type of the Pruinosae Group of American Hawthorns, 
distinguished by its large flowers with ten or twenty stamens and rose- 
colored or yellow anthers and five styles, and hard and often angled 
pruinose fruit which is red or remains green until it falls, the promi- 
nent and enlarged calyx of the flower being raised on a distinct tube. 
The Group is northern with southern representatives in northwestern 
Georgia and southern Missouri, and the species are usually shrubs only 
four being admitted as trees in Sargent’s New Manual of the Trees of 
North America. The type of the Group, P. pruinosa, which was first 
distinguished in Europe from cultivated plants, is in spring and late 
autumn one of the handsome species of the genus. It is a small tree 
from fifteen to twenty feet high, with a slender stem, spreading hori- 
zontal branches forming an irregular head and broad-lobed leaves. The 
flowers are an inch in diameter, in few-flowered clusters, with twenty 
stamens and deep rose colored anthers. The fruit is strongly angled, 
apple-green, and covered with a glaucous bloom until nearly ripe late 
in October when it is subglobose, barely angled, nearly an inch in diam- 
eter, dark purple-red and very lustrous. There is a good specimen of 
this Thorn in the old Crataegus Collection, and in the Peter’s Hill Col- 
lection this Group is well represented by a large number of species. 
Early American Azaleas. Three of the seven American Azaleas which 
are hardy and successfully grown in this Arboretum are in bloom. They 
are Rhododendron {Azalea) Vaseyi, R. {Azalea) nudijiorum and R. {Aza- 
lea) roseum. The first is a native of the southern Appalachian Moun- 
tains, with delicate pink or rarely white flowers which open before the 
leaves. The flowers of few Azaleas are more delicate in color, and few 
shrubs of comparatively recent introduction are better worth the atten- 
tion of garden lovers. There is now a large mass of this Azalea at 
the end of the first of the small ponds on the left hand side of the 
Meadow Road. The other species now in flower are native to and 
widely distributed in the eastern states. They have pink or rose-col- 
ored flowers. Of the two species R. roseum, which opens its flowers 
a few days later than R. nudijiorum, is a more beautiful plant with 
darker-colored and very fragrant flowers and, with the exception of the 
Appalachian flame-colored Azalea {R. calendulaceum), the handsomest 
of the American Azaleas which are hardy in Massachusetts. Although 
this plant was cultivated in England more than a hundred years ago, it 
has through wrong determination and confusion in names been little 
understood by American botanists and gardeners, and is still rare in 
cultivation. The fragrance of the rose-colored flowers is not surpassed 
by that of any other Azalea. Rhododendron nudijiorum and R. roseum 
are now growing on the lower side of Azalea Path, and there is a mass 
of larger plants of the latter on the right hand side of the Meadow 
Road in front of the Lindens. 
