HOFFMANN: FLORA OF BERKSHIRE COUNTY. 23^ 



E. palustris (L.) R. &. S. — Marshes, muddy shores and shallow 

 water; common. 



E. tenuis (Willd.) 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. tenellutn Nutt. — Bogs and marshes; frequent. 



E. virginicum L. — Wet meadows and bogs; frequent. 



var. album (xray. — 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. Bi:ak Rrsii. 



R. alba (L.) Vahl. — Bogs and marshes; frequent. 



var. macra Clarke. — Hayes Pond, Otis (Walters). 



R. capitellata fMichx.) Vahl. — {R. glomerafa IVIan. ed. 7 and 111. 

 Fl. od. 2; rifl. Kliodora, 20: 20, 1918.) 



Wet, i)caty me^adows, ill-drained hillsides and gravelly shores, 

 occasional. Williamstown; Florida, flood-plain of the Deerfield 

 River; Tyringham; Sheffield. 



SCIRPUS. Bulrush. 



Key to Scirpiis. 



a. InvoliKTC none, bristles white, long, giving the ho;ul the aspect of Erio- 



phoruin .S'. Inuisoninruis. 



a'. Iiivolucro foliacfous. 



h. liivolucral hract one (occasionally with a socoiulary, small involuccl) 

 appearing to be a continuation of the culm, 

 f. Spikclcts solitary; culms flaccid; plant aquatic. . . N. {niblerminalis 

 c'. Spikclcts distinct, paniculate or glonicrulatc. 

 d. Spikclcts sessile or in glomerulca. 



