Complimentary 
NEW SERIES VOL. X 
NO. 12 
ARNOLD ARBORETUM 
HARVARD UNIVERSITY 
BULLETIN 
OF 
POPULAR INFORMATION 
JAMAICA PLAIN. MASS. JULY 11. 1924 
Cornus racemosa. This northern Cornel has been largely used in the 
Arboretum in roadside plantations and is now conspicuous as the plants 
are covered with their small clusters of creamy white flowers. These 
later in the season will be followed by white translucent fruits borne on 
bright red stalks. Often called Cornus paniculata, it is a large- 
branched shrub six or seven feet high, with gray smooth branches, 
pointed leaves acute at the base, whitish below and glabrous. It is 
widely distributed from Maine to Ontario, Minnesota and southward. 
This Cornel is perhaps the handsomest of the American species with 
the exception of Cornus Jiorida. It has lately been the most conspic- 
uous plant in the Arboretum. It blooms here with some of the native 
Roses, especially with Rosa virginiana, the pink flowers of which 
compose perfectly with the white flowers of the Cornel. When these 
plants are used together, as along some of the Arboretum roads, de- 
lightful effects are obtained. 
Cornus arnoldiana is evidently a natural hybrid between two Ameri- 
can species, C. racemosa and C. obliqua, which appeared several years 
ago in the Arboretum and is now a large shrub with erect stems and 
characters intermediate between those of its supposed parents. Flow- 
ering a little later than C. racemosa it is now covered with flowers. 
The fruit, which is usually less abundant than the flowers, is white or 
bluish white. Interesting to students of plants, as are all natural 
hybrids, C. arnoldiana is not superior as a garden plant to C. racemosa 
except perhaps in its greater size. 
45 
