1918] Long,— Eragrostis peregrina 179 
tant points on this line and consequently has a considerable system 
of sidings about the station. A very hasty exploration made at 
twilight during a few spare moments before train arrival showed 
its occurrence on at least one of the tracks — very abundant, both 
inside and outside the rails. Being driven back to Hariisonville 
station a half-hour before train time by a heavy rain which proved 
to be only a passing shower, the time was occupied in investigating 
the weeds on the railroad ballast — with slightly more profit than 
usual. The dominant plant on the freight siding immediately back 
of the station proved to be E. peregrina, in many spots forming par- 
ticularly large, luxuriant colonies between the rails and ties. 
A day’s exploration in late July with Mr. J. P. Otis in upper New- 
castle County, Delaware, produced further evidence on its occurrence 
in another direction. Mr. Williamson’s collection at Delaware City 
was to be recalled, and as my train pulled into Wilmington the very 
weedy railroad yards at once suggested the presence of the species. 
Just outside the Pennsylvania station it was soon found, growing 
between the paving and the houses. In this situation and at the edge 
of the curbing it appeared to be a frequent plant of the ill-kept streets 
of this portion of the city. Later in the day it was picked up in an 
exsiccated roadside gutter south of Newport, and at Newport station 
it was found to be very abundant upon the nearby sidings, about the 
station platform, the railroad pump, and along adjacent roads and 
paths, covering solid areas to the exclusion of other species. 
The occurrence of the plant within Philadelphia itself had been so 
well established by other collectors that no especial effort was made to 
verify these collections. But when the eye had become trained to the 
detection of the plant, completely to overlook it became quite im- 
possible. It was even found to occur only a step away from the 
Philadelphia Academy, growing plentifully on the outer portion of the 
ancient brick pavement of Cherry Street near 19th Street. In 
travelling to and from my home, large solid colonies of apparently 
E. peregrina had been noted in the railroad yards by Huntingdon 
Street station on the Philadelphia & Reading. Opportunity was 
found between trains to investigate this spot. These yards are kept 
mostly quite clean but on one side, among several little used tracks, 
railroad débris, rails, spikes, etc., they are allowed to become weedy. 
Here E. peregrina is undisturbed and has become locally abundant. 
In his assiduous exploration of Lehigh County, Mr. Harold W. 
