HOFFMANN: FLORA OF BERKSHIRE COUNTY. 305 
Roadside ditches, swamps, moist clearings and borders of streams; 
common. 
E. HiRSUTUM L. — Established in a roadside ditch in low ground, 
Lenox. 
E. molle Torr.— {E. strictum 111. Fl. ed. 2.) 
Bogs; common. 
E. palustre L. — Low ground, Stockbridge. 
var. monticola Haussk. — Bogs and wet meadows; frequent. 
GAURA. 
G. BIENNIS L. — Rarely adventive in grassland or waste ground. 
North Adams; I>ee. 
LUDVIGIA. False Loosestrife. 
{Isnardia 111. Fl. ed. 2.) 
L. palustris (L.) Ell. Water Purslane. — Muddy borders of 
ponds and marshes, and in ditches; common. 
OENOTHERA. Evening Primrose. 
O. biennis L. Common Evening Primrose. — Fields, roadsides 
and clearings; common. 
0. muricata L. — Dry hillsides, roadsides and waste ground; 
common. 
0. pumila L. — (Kneiffia pumila 111. Fl. ed. 2.) 
Fields and roadsides; common. 
HALORAGIDACKAE. WATER MIL1Y)IL FAMILY. 
MYRIOPHYLLUM. ^\ xn:n Milfoil. 
M. exalbescens Fernald.— Vid. Rhodora, 21: 122 (19191. 
Shallow water in ponds; occasional. Stockbridge Howl, Stock- 
bridge; Cranberry Pond, West Stockbridge; Tlirec-inilc Pond. 
Sheffield. 
Difl'ers from il/. spicntum as follows: tlic jjriiicipal leaves of the 
primary stems have 14 to 21 pairs of rigid sU^nderly linear divisions; 
the bracts are rhombic obovate; the bractlets are suborbicular or 
reniform, broader than long, aiid distiiutly shorter than in most of 
M . cxalbesceus, 0.5 to O.S mm. long. 
