HOFFMANN: FLORA OF BERKSHIRE COUNTY. 249 
ORCHIS. 
{Galeorchis 111. Fl. ed. 2.) 
O. spectabilis I>. Showy Orchis. — Rich woods; frequent in the 
valley. Altitude 1000 feet, Sandisfield. 
POGONIA. 
P. ophioglossoides (L.) Ker. Rose Pogonia. — Marshes and 
peat bogs; frequent. Altitude 2000 feet, Hancock. 
P. verticillata (Willd.) Nutt. Whorled Pogonia. — (I.sofria 
verticillata 111. Fl. ed. 2.) 
Dry open woods; occasional in the valley. Great Barrington; Mt. 
Washington (Walters); Sheffield (Walters). For a description of 
specimens with anomalous flowers, collected by Walters in Mt. 
Washington, vid. Rhodora, 18: 252 (1916). 
SERAPIAS. 
S. Helleborine L. — A small colony of this rare European orchid 
was found by Miss Caroline Wells in 1898 under Norway Spruces in 
Stockbridge. The station has been since destroyed. 
SPIRANTHES. Ladies' Tresses. 
[llndiiun 111. Fl. ed. 2.) 
S. cernua (L.) Richard. — Wet meadows; common. 
var. ochroleuca (Rydb.) Ames. — In drier situations than the type; 
frequent. 
S. gracilis (Bigel.) Beck. — Dry open soil; common. 
S. lucida (H. H. Eaton) Ames. — {Ihidium planfagiucum 111. Fl. 
ed. 2.) 
Gravelly shores of ponds, borders of swamps and roadside ditches; 
frequent in the valleys. 
S. Romanzoffiana Cham. — Bogs; occasional. North Adams 
(White); Hinsdale (Moody); Lanesboro; Pittsfield; Monterey 
(Walters); Great Barrington; Egremont. 
SALICACEAE. Willow F.vmily. 
POPULUS. Poi'i.Au. 
P. ALBA L. White Poi'lah. — Occasionally spreading from culti- 
vation. 
