172 Rhodora [SEPTEMBER 
FAGOPYRUM. 
F. ESCULENTUM Moench. | Persistent after cultivation and escaping, 
frequent. 
F. TaTARICUM (L.) Gaertn. In similar situations; Nahant, Somer- 
ville, Cambridge, Dedham, Sherborn. 
l 
POLYGONELLA. 
P. articulata (L.) Meisn. Dry sand and gravel, very common 
throughout. 
POLYGONUM. 
P. acre HBK. Wet soil, very common throughout. 
P. acre HBK., var. leptostachyum Meisn. Well distributed 
throughout. 
P. amphibium L. Ponds and shallow water. Apparently rather 
frequent in Essex County, also at Glacialis Pond, Cambridge (G. G. 
Kennedy, June 26, 1863); Framingham (A. J. Eames, Sept. 20, 1908). 
P. amphibium L., f. Hartwrightii (Gray) Blake. (See RHODORA 
xv. 164, 1913.) Muddy shores, Chelmsford, Cambridge, W. "— 
Woburn, Sherborn. 
P. amphibium L., f. terrestre (Leers) Blake. (See RHODORA xv. 
164, 1913.) On Newburyport turnpike, Ipswich (John A. Lowell, 
no date); on shore near type in W. P. Upham’s pond, Peabody 
(J. Robinson, July 30, 1874); Fresh Pond, Cambridge (W. G. Farlow, 
September, 1878). 
P. ARENARIUM Waldst. & Kit. Vacant land, Back Bay, Boston 
(W. P. Rich, July 18, 1906); South Boston flats (W. P. Rich, July, 
1899). See Ruopora x. 152, 1908. Native of southern Europe, 
extensively used in California for rockeries and bouquets. 
P. arifolium L. Meadows, ditches and low woods; common 
throughout. : 
P. aviculare L. Dooryards, sidewalks and waste places; very 
common throughout. 
P. aviculare L., var. angustifolium Meisn. Gravelly soil, Back 
Bay Fens (A. S. Pease, Oct. 9, 1906); waste ground, Dorchester (J. 
R. Churchill, Oct. 20, 1894). 
