1923] Long,—Occurrence of Prunus Padus in America 175 
But after holding up a flowering branch at arm's length, smelling it 
and casting upon it a critical glance, she said, “No, I guess it’s locust.” 
That there may be other specimens in this immediate vicinity is 
evidenced by material collected by Mr. MacElwee in 1899 " opposite 
the old mill on the island." This is only a short distance below the 
main road-bridge but a somewhat cursory search in 1918 failed to 
reveal the species there. 
Further up Tacony Creek, on a tributary streamlet near the village 
of Cheltenham, in Montgomery County, the cherry has again been 
picked up—a small plant growing in natural woodland. 
At Ashbourne, a couple of miles still further up Tacony Creek, 
the species is again to be seen. On the freshet-swept banks of the 
creek below the village occurs a well rounded, much-branched tree 
ten feet high. There are several smaller individuals in adjacent 
woods and thickets within a quarter-mile. 
To the eastward of this general region about Tacony Creek another 
area for the cherry may be encountered. Going out from the city 
along Oxford Pike, the Philadelphia botanist will notice beyond 
Frankford an abundance of the little round-headed trees of the Sour 
Cherry about the site of a former habitation. This is not a common 
naturalized species in the vicinity of the city and if he stops here 
numerous other species will be found spreading from the original 
plantings or thoroughly naturalized. Here are al nost impenetrable 
thickets of naturalized Prickly Ash, Zanthoxylon americanum, an 
abundance of Silver Maple, also naturalized, a shrub or two of Silver 
Bell growing wild—among these the Bird Cherry. This station was 
brought to notice by the discerning eyes of Mr. R. R. Dreisbach. 
If one continues on, turning into the Roosevelt Boulevard, Penny- 
pack Park will be reached in a few miles. In the rich alluvial woods 
not far down Pennypack Creek there are a half-dozen trees of the 
Bird Cherry. They are tall, straight, slender specimens ranging from 
twenty feet to as much as fifty feet in height. The fact that this 
station occurs in Pennypack Park is not to be misconstrued into a 
belief that the cherries may have been planted. The park is of 
recent founding and embraces the natural wooded valley of the creek 
—the cherries long antedating the park. There is nothing to suggest 
to the novice that these are foreign plants (so indigenous-like do they 
appear in these wild woods) except the presence not far away of the 
common Day Lily—too frequent, however, to be much of an indicator 
of introduced species. 
