196 Rhodora [Oc1oBER 
A specimen of the Greenfield Euphorbia in fruit is in my herbarium. 
There are now on record four American stations where Euphorbia 
Cyparissias has been found in fruit, Shelburne, New Hampshire, 
Greenfield, Massachusetts, Staten Island, New York, and Galt, 
Ontario. Ishall continue to seek information in regard to the fruiting 
status of this species, and I trust that any new cases will be called to 
my attention. 
CAMBRIDGE, MASSACHUSETTS. 
THE SAND PLUM IN INDIANA. 
E, J. Hii. 
DuniNG the summer of 1906 I discovered a Prunus which differed 
from any heretofore seen in the region about Chicago. It was growing 
in the sand just without the right of way of the Lake Shore and Michi- 
gan Southern Railroad, near Dune Park, Lake County, Indiana. 
The nearness to the railroad and the striking difference between its 
leaves and those of Prunus Americana, the common wild plum of this 
region, led me to conclude that it was an introduction. It was mainly 
represented by bushy branched shrubs, 1-3 m. high, which were quite 
thorny, or provided with short, spinescent branches. They formed 
two narrow thickets, each extending for several rods beside the fence 
which separated them from the railroad. They were examined the 
next spring for flowers, but too late for petals. No fruit set that year. 
In the spring of 1908 good flowers were obtained May 2nd, about two 
weeks earlier than the time of visiting them the year before. No fruit 
was borne that year. Enough had been disclosed by the flowers to 
make it evident that, if perfected, the fruit would be a plum. But, 
from the character of the leaves and flowers, and the habit of the 
shrub, I had concluded it was the sand plum, P. Watsoni Sarg., or if 
not specifically distinct, P. angustifolia Marsh., var. Watsoni (Sarg.) 
Waugh, introduced here from the western plains. Since it freely 
spreads by long roots running just below the surface of the ground, 
sending up new shoots or suckers at the distance of 4 or 5 m from the 
