258 PROCEEDINGS: BOSTON SOCIETY NATURAL HISTORY. 
F. TATARicuM (L.) Gacrtn. India-wheat. — In prainfields and 
waste ground, SheflicUl (Tlmrcliill). 
POLYGONUM. Knotweed. 
{Persictiriii 111. Fl. od. 7 in part.) 
P. acre HBK., var. leptostachyum Meisn. Water Smartweed. 
— Low ground; common. 
P. amphibium L. — {Prrsicaria amjjJiihia 111. Fl. ed. 2.) 
In .shallow A\ater or on muddy shores; common. 
var. Hartwrightii (Gray) Bissell. Borders of swamps and in 
marshes; fre(iu('nt. 
forma terrestre (Leers) Blake. — (var. terrcstre Man. ed. 7; 
md. Rhodora, 15: 164, 1913.) 
Muddy shores; occasional. Pittsfield; Stockbridge. Specimens 
collected at Lake Averic, Stockbridge, show the above variety and 
the form growing from the same rootstock. 
P. arifolium L. Halberd-leaved Tear-thumb. — {Tracaulon 
arifolivm 111. Fl. ed. 2.) 
Swamps and low ground; frequent. 
P. aviculare L. Knotgrass; Doorweed. — Dooryards, road- 
sides and cultivated ground; common. 
var. angustissimum Meisn. — On ledges bordering Guilder Pond, 
Mt. Washington. Altitude 2000 feet. 
var. vegetum Ledeb. — Yards, roadsides and cultivated ground; 
common. 
P. Careyi Olney. — {Persicaria Carcyi 111. Fl. ed. 2.) 
Border of Rudd Pond, Becket. 
P. cilinode Michx. Bindweed. — ( Tinaria cilinodis 111. Fl. ed. 2.) 
Rocky woods and on ledges; common. 
P. Convolvulus. Black Bindweed. — ( Tinaria convohuhis 111. 
Fl. ed. 2.) 
Cultivated ground and clearings; common. 
P. erectum L. — Yards and roadsides; occasional. Williamstown 
(Churchill); Lenox; New Marlboro (Walters). 
P. Hydropiper L. Common Smartweed; Water Pepper. — 
{Persicaria Hydropiper 111. Fl. ed. 2.) 
Moist shaded ground; common. 
P. hydropiperoides Michx. Mild Water Pepper. — (Persicaria 
hydropiperoides 111. Fl. ed. 2.) 
