OF, 
provide a better habitat for northern plants. In the sand area 
adjacent to the pond the last representative of the big willow trees 
was partially blown down during the 1938 hurricane. The entire 
trunk was subsequently removed and for it was substituted a sour 
gum, Nyssa sylvatica, which should in a few years give just the 
right ecological accent to the borders of the pond. The inner 
slope of the border-mound parallel to Flatbush Avenue and near 
the Adolph Engler tulip tree has been reconstructed with peat and 
sand to provide a moraine-type of habitat for plants of northern 
mountain exposures, and, backed with rhododendrons, this area will 
become the source of the brook which now parallels the lower 
margin of the border-mound. The little ravine in the present 
rhododendron thicket has been deepened and the excavated mate- 
rial added partly to the border-mound and partly to the knoll, 
which is now growing up in hemlocks and white oaks. As each 
year goes by, the natural fall of leaves and the growth of roots 
lead to a betterment of forest conditions and a corresponding 
decrease in weeds. Our success in growing native plants in this 
area is, I believe, due in large part to the exclusion of fertilizers, 
which increase the growth of foreign weeds and which seem to 
be detrimental to most native plants. 
To increase the display of early spring flowers two hundred 
trilliums were planted during 1939. A number of white pines 
were planted on the border-mound near the bog. During the 
coming year a fairly large planting of native rhododendrons and 
some hemlocks should be added to the slopes of the border-mound. 
HERBARIUM MATERIAL LOANED 
Sheets 
Charette, Mr. [eer AC eB Urpin eLOl g Vibe ce. e a cys Whe Neusicre to ee wesley aS rs 1 
Core, Dr. E. L., W es Virginia University, Morgantown, W. Va. .... 112 
an Me . S., Botanical Museum, Harvard University ......... 2 
Grant, Dr. M. i Towa State Teachers College, Cedar Falls, Ta. .... 480 
erimnann, ie. |e 0 oe Weptcor Meoricultanes Washington, D. C. 9 
yron, Dr. J. H., Duke Uae, Burham= Ne Curis. tae onal ereres: 137 
Strickland, Mr. J. C., Jr., University of Virginia, Charlottesville .... 51 
Wilt. WoO). 5. B.,5C. Bemnnd College, St. Bernard, Alabama ....... 5 
