HOFFMANN: FLORA OF BERKSHIRE COUNTY. 233 
E. palustris (L.) R. &. S. — Marshes, muddy shores and shallow 
water; common. 
E. tenuis OYilkl.) Schultes. — Wet places; common. 
ERIOPHORUM. CoTTox Grass. 
E. callitrix Cham. Hare's Tail. — Peat bogs; occasional on the 
plateau. Savoy; Becket; Washington; New Marlboro. 
E. gracile Roth. — Marshes and peat bogs; occasional. Cheshire 
(Cushman); Becket (Walters); Monterey. 
E. tenellum Nutt. — Bogs and marshes; freciuent. 
E. virginicum L. — Wet meadows and bogs; frequent. 
var. album Gray. — Occasional on the plateau. Washington; Otis. 
E. viridi-carinatum (Engelm.) Fernald. — Wet meadows and 
swamps; common. 
var. Fellowsii Fernald. — Larch swamp, Sheffield (Fernald). 
FIMBRISTYLIS. 
F. Frankii Steud. — Gravelly border of Richmond Lake, Richmond; 
sandy border of Konkapot River, Sheffield. 
RYNCHOSPORA. Beak Rush. 
R. alba (T>.) Vahl. — Bogs and marshes; frequent. 
var. macra Clarke. — Hayes Pond, Otis (Walters). 
R. capitellata (Michx.) Vahl. — (/?. glomcrafa Man. ed. 7 and 111. 
Fl. ed. 2; rid. Rhodora. 20: 20, lOlS.) 
Wet, peaty meadows, ill-(h-ained hillsides and gravelly shores, 
occasional. Williamstown; Fiorichi, flood-phiiii of the Deerfield 
River; Tyringhani; Sheffield. 
SCIRPUS. Bulrush. 
Kvt/ to Scirpus. 
a. Involucre none, bristles white, lon^, fiivinf:: the liead the aspect of Erio- 
])horuii) <S. hudsonianus. 
a'. Involucre foliuceous. 
h. Involucral bract one (occasionally with a sccomlarv, small involucel) 
ai)i)('arinK to l)c a continuatioii of the cuhn. 
c. Spikclcts solitary; culms (lacrid; plant aijualic .. N. .^ublcrminnlis 
c'. Spikclcts distinct, paniculate or liloincrulatc. 
d. Spikclcts sessile or in tzlomcrulcs. 
