left-hand side of the South Street entrance. The fruit of the first 
ripens in August, that of the latter in October. 
One of the most interesting of the natural groups for the decoration 
of gardens and shrubbery borders is the Intricatae. The plants of this 
group are nearly all small, late-flowering shrubs, although the group 
contains a few small trees from the southern Appalachian region. 
These little shrubs produce very large flowers usually in few-flowered 
clusters; their fruit is often showy and their leaves turn brilliantly in 
the autumn. The largest number of the species of the Intricatae have 
been found in Pennsylvania and Michigan; they occur also in western 
New England, in New York and Ontario, but are extremely rare in 
all the region west of the Mississippi River. The plants of this group 
are arranged together on the lower side of the road at the eastern 
base of Peter’s Hill and will soon be in bloom. 
In the old collection, near the Forest Hills Gate, several other groups 
are well represented by flowering and fruiting plants; the Crus-galli 
by C. fecunda , a large wide-spreading tree from the neighborhood of 
St. Louis; the Dilatatae by C. coccinioides from the same region, well 
distinguished by its very compact clusters of large flowers; the Virides 
by C. nitida from the bottom-lands of the Missouri River in Illinois, 
opposite St. Louis, a handsome, flat-topped tree with wide-spreading 
branches; the Pruinosae by the type of the group, C. pruinosa, a 
widely distributed eastern tree and one of the most beautiful of the 
genus both in its flowers and fruits; the Flavae, a group confined to 
the southeastern states, by C. aprica from the neighborhood of Ash- 
ville, North Carolina; and the Tomentosae by several forms of C. tomen- 
tosa, by the beautiful C. succulenta with its drooping clusters of bril- 
liant fruits, and by C. prunifolia, a plant which, although it has been 
cultivated in England for more than a century, has not yet been found 
growing wild. 
On the south slope of the Overlook on Bussey Hill there is a group 
of several plants of C. punctata. This is a large, wide-branched, flat- 
topped tree and one of the commonest and most widely distributed of 
American Thorns, growing from the St. Lawrence Valley to North 
Carolina and to Illinois. This species is interesting because some indi- 
viduals bear red and others bright yellow fruit. 
Species of Crataegus are few in western Europe and in all of Asia, 
but there are a number of handsome species in southeastern Europe, 
Asia Minor and the Caucasus. Nearly all the Old World species and 
many of their varieties are now growing more or less well in the 
Arboretum and can be seen both in the old collection and on Peter’s 
Hill. Among the exotic species none is more beautiful here than Cra- 
taegus pinnatifida from northern China and Manchuria. This is a plant 
with large and very deeply divided lustrous leaves. Growing wild it is 
a medium-sized shrub with comparatively small fruits, but it has been 
long cultivated in orchards in northern China as a fruit tree, and by 
cultivation it has been developed into a tree with large and edible 
fruits. 
Many of the North American Hawthorns grow naturally in limestone 
soil, but in cultivation they thrive in all soils, grow rapidly, and many 
of the species begin to flower when very small. They suffer, like many 
other plants of the Rose Family, from the attacks of the San Jose 
scale, and the leaves are often disfigured or killed by the larvae of a 
