( 30 ) 
in the neighborhood of the shelter station, was extended 
by adding groups of white birch, alders, and elders; around 
the shelter house was placed a groups of thorns and swamp 
rose; in the rhododendron banks the natural growth of 
sassafras trees was enlarged by adding more, and addi- 
tional groups of thorns and Kentucky coffee-trees were 
added for shade for the rhododendrons, and to relieve the 
flatness of the banks; catalpas were planted along the 
driveway to the east of the north bridge; the decorative 
group of cherries in the fruticetum near the lake bridge 
has been enlarged by about 50 plants; about 22,000 bulbs 
were planted in various parts of the grounds—in the differ- 
ent flower beds for early flowering effects, in the rhodo- 
dendron banks, among the shrubbery, and in the stone 
enclosure around the fountain at the foot of the approach. 
Investigations 
In addition to my ordinary duties, I have continued my 
studies upon the grasses for NortH AMERICAN F ora, 
and have submitted for publication manuscript for another 
part, including the remainder of the tribe Andropogoneae, 
the tribes Zoysieae and Tristegineae, and a part of the 
tribe Paniceae. 
Respectfully submitted, 
GeorcE V. Nasu, 
Head Gardener. 
