176 Rhodora [OCTOBER 
All the localities above described lie within ten miles or less of the 
center of Philadelphia. Several other stations more removed have 
come to notice. Twenty miles northwestward in Pennsylvania a 
collection has been made near Gwynedd Valley in Montgomery 
County. Up the Delaware River it has been collected in Burlington 
County, New Jersey at Edgewater Park and near Bordentown, 
fifteen and twenty-five miles, respectively, to the northeast. To the 
southwest of Philadelphia there is material from Ivy Mills in Delaware 
County, Pennsylvania, fifteen miles distant, and from Mount Cuba 
in Newcastle County, Delaware, twenty-five miles away. 
The material from the vicinity of Gwynedd Valley was collected by 
Mr. MacElwee, May 4, 1902, at the crossroads village, Franklinville. 
Exploration with a detailed map from the collector indicating the 
probable spot failed upon two occasions in 1922 to reveal the cherry 
but the region is one of such extensive fence-rows, thickets and woods 
that, among the abundant Wild Black Cherries occurring there, a 
small tree or two of the Bird Cherry might readily be overlooked. 
It may be noted in passing, however, that the region is evidently 
a favorable one for introductions. The Japanese Barberry, Berberis 
Thunbergii, is probably more thoroughly naturalized here than in any 
other locality about Philadelphia. There is an abundance of the 
Garden Red Currant in wild thickets near the village. At other spots 
on roadsides are naturalized Poet's Narcissus and Everlasting Pea. 
On the alluvial banks of the Delaware River above Edgewater 
Park there is a small specime of the cherry associated with the 
Ash-leaved Maple, the Red Ash and the White Mulberry (the last 
abundantly naturalized in the Delaware valley). It is obviously of 
spontaneous origin, its position on the very edge of the river sug- 
gesting the possibility of the seed having been carried by the water. 
It fruits well, its branches overhanging the river, and some of its 
seeds might easily be dispersed, in turn, by means of the river. 
The Bordentown locality is on a tributary of Black's Creek, in the 
general vicinity of Dunn's Mills, and about a mile back from the 
Delaware. On the crest of the wooded slope by the stream there is a 
tree of the cherry about ten feet high and as broad. It is in a rather 
dense tangle of woods and tall thickets adjacent to an old farm. 
Fragments of broken china and crumbling farm implements protruding 
from the soil, nearby, evidence a former rubbish heap. Another 
spreading tree of similar size is in rich alluvial woods about a quarter- 
