( 109 ) 
4. The herbaceous grounds, situated in a valley east of 
the great greenhouse near the Southern Boulevard entrance, 
containing collections of hardy herbaceous plants, arranged 
by botanical relationship, and also a collection of similar 
plants, arranged to demonstrate elementary botany; the 
economic garden, a plantation designed to illustrate hardy 
plants whose products are directly useful to man, is being in- 
stalled in the northern part of the same valley 
5. The fruticetum, or collection of hardy shrubs, located 
on the plain northeast of the museum building at the Wood- 
lawn Road entrance and extending northward into the north 
meadows; this collection is also arranged by botanical 
relationship. 
6. The deciduous arboretum, or collection of trees which 
lose their leaves in the autumn, located along the entire east- 
ern side of the grounds from south to north. 
In addition to these artificial features, the following natural 
features are of special interest : 
7. The hemlock grove, a forest of the Canadian hemlock 
spruce, clothing the hills between the museum building and 
the Bronx River and covering about forty acres, considerable 
portions of it being primeval. 
8. The gorge of the Bronx River, extending south from 
the waterfall at the Lorillard Mansion, along the edge of 
the hemlock grove to the southern boundary of the Garden. 
g. The north meadows and river woods along the Bronx 
River from the northern end of the hemlock grove to the 
northern end of the Garden. 
1. The Conservatories 
This great glass-house is 512 feet in length, with a central 
dome about go feet in height, and wings extending from the 
main range in such a way as to form a court open to the 
southwest. The area under glass is about one acre. The 
building stands on a terrace 5 feet in height, approached 
by six flights of cut granite steps connecting with the path 
and driveway approaches. The house contains fifteen com- 
