1919] Flora of the Boston District, — XXXI 125 
REPORTS ON THE FLORA OF THE BOSTON 
DISTRICT, — XXXI. 
CALLITRICHACEAE. 
CALLITRICHE. 
C. heterophylla Pursh. Brooks, occasional; no reports from 
southern towns of district. 
C. palustris L. Brooks and wet places, frequent throughout. 
ANACARDIACEAE. 
RHUS. 
R. copallina L. Dry sandy and rocky soil, common throughout. 
R. Cotinus L. Waste land, Beverly Farms (F. T. Hubbard, June 
20, 1913); escaped, Medford (L. L. Dame, July, 1886). 
R. glabra L. Dry soil very common throughout. [Forma 
lacinata (Carr.) Robinson has been reported from Weston and Scituate, 
but no specimens have been preserved.] 
R. Toxicodendron L. Fields, roadsides, woods and sea-beaches, 
common throughout. 
R. Toxicodendron L., var. radicans (L.) Torr. On trees and 
walls, common. 
[Beside the above variety there seem to be three other forms in 
our region: the slender prostrate vine of dry fields and river thickets; 
a bushy form with large dark green leaves which stands alone or forms 
hedges along stonewalls; and the thick-leaved, compact plants which 
grow on the sea-beaches above high water.] 
R. typhina L. Dry soil, common throughout. 
R. Vernix L. Swamps and low ground; common, but not always 
abundant. 
AQUIFOLIACEAE. 
ILE X. 
I. glabra (L.) Gray. Swamps and moist woods; abundant at 
Magnolia swamp in Gloucester, also reported from Rockport and 
