16 
western China. If they prove permanently successful here this Daphne 
will be a delightful addition to our early-flowering dwarf shrubs. 
Crataegus Arnoldiana. This Hawthorn was never fuller of flower- 
buds than it is this spring and these will soon be open. This tree was 
discovered growing naturally on a wooded bank in the Arboretum; it 
grows also on the banks of the Mystic River in West Medford, Massa- 
chusetts, and near New London, Connecticut. It belongs to the Molles 
group of Hawthorns, which are trees distinguished by their large size, 
by their large early flowers which usually open with the unfolding of 
the leaves, and by the large, often edible, scarlet or rarely yellow 
fruits. There are several species found from the valley of the St. 
Lawrence River in the Province of Quebec to Texas. The species are, 
however, most numerous in the region west of the Mississippi River, and 
are almost entirely wanting in the southeastern states. C. Arnoldiana 
is one of the handsomest of the species of this group which is hardy 
here. The brilliant red fruit ripens late in August and falls in Sep- 
tember earlier than that of the other species. In winter this tree is 
easily recognized by its upright growing, distinctly zigzag branches 
which are more thickly covered with spines than those of many of the 
related species. The largest trees of this Thorn can be seen on the left- 
hand side of the Valley Road just inside the Centre Street Gate and 
in front of the Platanus Collection. There are also several of these 
trees in front of the group of White Oaks, also on the left-hand side 
of the Valley Road. At the South Street entrance there are large 
plants of three other species of the Molles Group, C. mollis from the 
Ohio-Illinois region, C. arkansana from central Arkansas, and C. sub- 
mollis, a Canadian and New England tree. These will all be in flower 
in a few days. 
Malus Sieboldii, var. calocarpa. This Japanese Crabapple is one of 
the handsomest in the Arboretum both in spring and autumn. It is a 
broad tree-like shrub or small tree with only slightly lobed leaves, pink 
and white flowers fully an inch in diameter and brilliant scarlet lus- 
trous fruits which are half an inch in diameter and more beautiful per- 
haps than those of any other Crabapple. This beautiful plant was raised 
from seed presented to the Arboretum in 1890 by Dr. William Sturgis 
Bigelow of Boston. It can be seen in the front row of the Crabapple 
Collection at the eastern base of Hemlock Hill. It has been found 
that Sieboldii is the oldest and therefore the proper name for the 
Chinese and Japanese Crabapple which up to this time has been known 
in gardens as Malus or Pyrus torivgo. 
It is interesting to note that Wilson found in western China the 
wild, single-flowered form of the beautiful Crabapple with rose-colored, 
semi-double flowers, Malus Halliana, or the Parkman Crab, which first 
came to this country from Japan, and was long believed to be a Japan- 
ese species. It is the Kaido of Japanese gardens. To the double- 
flowered form, which is the one generally cultivated in eastern gar- 
dens, the name Malus Halliana Parkmanii has been given; it is flow- 
ering well in the Arboretum this year. 
