violet-colored flowers crowded in clustered terminal spikes. This striking 
looking plant grows three or four feet tall and is a native of the middle 
west where it grows on hills and prairies from Indiana to Minnesota and 
southward. 
The last of the Horsechestnuts to flower, Aesculus parviflora, is now 
covered with its long, narrow, erect spikes of small white flowers. This 
is a broad, round-topped, shapely shrub well suited for planting in large 
masses or as a single specimen. In good soil and uncrowded by other 
plants it soon spreads over a large area. A native of the southeastern 
states where it is found from South Carolina to Florida and Alabama, 
this Horsechestnut is perfectly hardy in New England, and in cultivation 
at the north it grows into a larger and a finer plant than in its native 
wilds. There is a mass of these plants at the northern base of the wooded 
hill on the right-hand side of the Meadow Road and in the rear of the 
Horsechestnut Group. 
One of the handsome shrubs of eastern North America, the Spice-bush, 
Clethra alnifolia, will not be in bloom before the end of the month, al- 
though its flower-buds are already well developed. The white fragrant 
flowers are produced in erect terminal spikes and contrast beautifully 
with the dark green leaves. Masses of this shrub, which lends itself 
perfectly to cultivation, have been planted in the borders along the 
Meadow Road. 
Panax sessiliflorum is just opening its flowers which are small and in- 
conspicuous, and are borne in globose, compact, terminal heads. This is 
a large, hardy and vigorous shrub from eastern Siberia, with dark green 
divided leaves and black showy fruits which form large clusters at the 
ends of the branches and, remaining in good condition until late in the 
winter, are very conspicuous on the naked branches. A useful plant for 
public parks and wherever there is space for its wide-spreading branches 
to extend, this member of the Aralia Family is still little known. With 
the other members of this family it can be seen close to the pond on 
the right-hand side of the Meadow Road between the Witch Hazel Group 
and the Cornel or Dogwood Group. 
These bulletins will be discontinued through the remainder of the 
summer. 
An illustrated guide to the Arboretum containing a map showing the 
position of the different groups of plants has recently been published. It 
will be found useful to persons unfamiliar with the position of the differ- 
ent groups of plants. Copies of this guide can be obtained at the Admin- 
istration Building in the Arboretum, from the Secretary of the Massa- 
chusetts Horticultural Society, 300 Massachusetts Avenue, Boston, from 
The Houghton, Mifflin Company, 4 Park Street, Boston, and at the Old 
Corner Bookstore, Bromfield Street, Boston. 
The Arboretum will be grateful for any publicity 
given these Bulletins. 
