HOFFMANN: FLORA OF BERKSHIRE COUNTY. 345 
b'. Leaf-base tapering, not sagittate f. angustipes. 
Leaves with broadly falcate, or obovate and obliquely truncate, entire 
or toothed lobes; upper leaves similar or unlobed and lanceolate or 
ovate-lanceolate, rarely oblanceolate or obovate, entire or rarely 
toothed. 
c. Leaf-base sagittate, clasping var. latifolia. 
c'. Leaf-base tapering, not sagittate f . exauriculata. 
Leaves all unlobed, lanceolate, oblong, oblanceolate or obovate, entire 
or denticulate, the lowest sometimes shallowdy lobed. 
d. Cauline leaves lanceolate to ovate lanceolate, entire or rarely 
toothed. 
e. Leaf-base sagittate, clasping var. integrifolia. 
e'. Leaf-base not sagittate f. angustata. 
d'. Cauline leaves oblanceolate or obovate, usually toothed. 
/. Leaf-base sagittately clasping var. obovata. 
/'. Leaf-base tapering, not sagittate f. stenopoda. 
L. canadensis L., var. typica Wiegand. Wild Lettuce; Horse- 
weed. — Roadsides, thickets and low ground; frequent. 
var. typica Wiegand, forma angustipes Wiegand. — Roadsides, 
dry woods and low ground; frequent. Often hirsute on the lower 
part of the stem. 
var. latifolia O. Kuntze. — Roadsides, thickets and low ground; 
common. 
var. latifolia O. Kuntze, f. exauriculata Wiegand. — With the 
type; occasional. 
var. integrifolia (Bigel.) Gray. — Occasional, Mt. Washington. 
var. integrifolia (Bigel.) Gray, f. angustata Wiegand. — Occa- 
sional; dry thicket, Stockbridge. 
var. obovata Wiegand. — (L. integrifolia Man. ed. 7.) 
Cheshire (E. J. Winslow). 
var. obovata Wiegand, f. stenopoda Wiegand. — A specimen 
transitional to var. infcr/rifolia, f. aiKjihsfata from a dry roadside thicket. 
New Marlboro. 
The above forms have been determined by Professor Wiegand. 
L. SCARIOLA L. Prickly Lettuce. — Waste ground ; rare. Wil- 
iiainstown (Churchill); Pittsncld. 
var. integrata Gren. & Godr. — Waste ground; occasional. 
Florida; Cheshire; Great Barrington. 
L. spicata (Lam.) Hitchc. Wild Blue Lettuce. — Shaded banks ; 
coniiuoii. 
