1924] Flora of the Boston District, —XLII 17 
V. Lentago L. Wet thickets and shores, common throughout. 
V. Oputus L. Bradford, apparently escaped from cultivation; 
also at Beaver Brook Reservation; probably elsewhere. 
V. Opulus L., var. americanum Ait. See RHopora xx. 15, 1918. 
Cold swamps in the northern towns, rare. 
VALERIANACEAE. 
VALERIANA. 
V. oFFICINALIS L. Escaped from cultivation at Revere, Lincoln, 
Natick and Milton. 
DIPSACEAE. 
DIPSACUS. 
D. sytvestris Huds. About a dump, Cambridge (M. L. Fernald 
& B. Long, Aug. 28, 1913). Specimen in herb. N. E. Botanical 
Club. Also at Danvers. 
KNAUTIA. 
K. arvensis (L.) T. Coulter. Near Natural History building, 
Boston (C. W. Swan, 1883); overrunning a field, Hanover (II. A. 
Purdie, June 6, 1897). 
SCABIOSA. 
S. CoLUMBARIA L. Boston (C. E. Perkins, Aug. 20, 1880); Speci- 
men in herb. N. T. Kidder. 
SUCCISA. 
S. PRATENSIS Moench. Bank of Merrimac River, Riverside, 
Haverhill, (J. R. Lunt, Aug. 22, 26, 1911). Specimens in herb. Gray. 
See Ruopora xiv. 174, 1912. 
CUCURBITACEAE. 
The garden vegetables in this family are annuals, very sensitive to 
frost, and although they come up freely in waste places, it is doubt- 
ful if they ripen fruit in a wild state and reappear a second season. 
CITRULLUS. 
C. VULGARIS Schrad. Waste places in Woburn, Arlington, Cam- 
bridge and Boston. 
