HARSHBERGER : PHYTO-GEOGRAPHIC SKETCH 159 
3. Vegetable-garden area, (a) Kitchen-gardens, (b) Truck- 
gardens. 
4. Nursery area. 
5. House- and garden-plant area. 
6. Botanic-garden area. 
These must be dismissed because an accurate and detailed de- 
scription is not possible here. They are mentioned because the 
natural vegetation of the region has been modified and influenced 
by the establishment of farms, gardens and suburban parks. Ifa 
phyto-geographic chart of the region was to be constructed, such 
as Robert Smith has done for Scotland, all of these areas would 
have to be surveyed and located upon the map. In closing, the 
writer believes that enough has been given in this sketch to serve 
as an introduction to the plant geography of a region of consid- 
erable botanical interest, historic and otherwise. 
UNIVERSITY OF PENNSYLVANIA, 
