32 
larg^est plants of N. sinensis are on Hickory Path near Centre Street, 
and it can also be seen in the collection of Chinese shrubs on the 
southern slope of Bussey Hill. 
Dwarf Hawthorns. Among the dwarf Hawthorns of the United 
States are a number of plants which promise to be of great value for 
the decoration of gardens, where, however, they are still almost un- 
known; indeed until a few years ago they had been almost entirely 
overlooked or neglected by botanists and gardeners. One dwarf 
species, however, C. unijiora, was cultivated in England by Bishop 
Compton as early as 1713 and is still occasionally met with in gardens. 
It is a shrub a foot or two high with small leaves, and small flowers 
in one or rarely in two-flowered clusters, and green fruit. This little 
shrub grows in sandy soil from Pennsylvania to Alabama, usually in 
the region near the coast. ’It is now in flower in the Arboretum and 
has no great value as a garden plant. It is interesting, however, as 
the type of one of the natural groups, the Uniflorae, in which the 
species of Hawthorns are arranged. Another species of this group, C. 
Smithii, is also in flower. This little shrub is a native of western 
Pennsylvania and is distinguished by the serration of its leaves and 
by its two- or three-flowered flower-clusters. Only one other dwarf 
species, C. intricata, was cultivated before 1900 when the Arboretum 
began the systematic study of American Hawthorns. This shrub was 
described in Europe in 1894 from a plant cultivated in the Botanic 
Garden at Copenhagen and has been made the type of the Intricatae 
Group. The plants of this group are mostly shrubs from one to four 
feet high, although in the southern Appalachian region a few of the 
species become small trees. The largest number of species is found 
in Pennsylvania but these plants are not rare in southern New England, 
New York and Ontario. Only a few have been found in the region 
west of the Mississippi River and they do not occur in the coast region 
of the South Atlantic and Gulf States. These plants mostly flower 
late and have large and showy flowers usually in few-flowered clusters, 
and large, red, yellow or green, late-ripening fruit. A number of the 
Intricatae are flowering in the Arboretum this year where they can 
be seen on the lower side of the road at the eastern base of Peter’s 
Hill, directly north of the Crabapple Collection. Crataegus trijiora^ 
the type of another group, the Triflorae, is also in flower here. This 
is a shrub with large leaves, flowers probably larger than those of any 
other dwarf Hawthorn, and often an inch and a quarter in diameter, in 
from three- to six-, usually only three-flowered clusters, and large dull 
red fruit. A comparatively rare plant, C. trijiora grows on the bluffs 
of the Coosa River, at Rome, Georgia, in one or two places in northern 
Alabama, and in northeastern Mississippi. 
Lonicera pileata. Evergreen shrubs hardy in this climate are so few 
in number that it is desirable to call attention to this little Chinese 
Honeysuckle which has now been growing without protection in the 
Arboretum for several years and has been in flower for several weeks. 
It has prostrate stems which form a low compact mat, leaves which 
resemble those of some form of the Box-tree, and small, pale-yellow, 
very fragrant flowers. This Honeysuckle should prove an excellent 
plant for the rock garden. Plants can be seen on Hickory Path near 
Centre Street and in the collection of Chinese shrubs on the southern 
slope of Bussey Hill. 
