HOFFMANN: FLQRA OF BERKSHIRE COUNTY. 249 



ORCHIS. 



(Galeorchis 111. Fl. ed. 2.) 



O. spectabilis L. 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. Whoeled Pogonia. — {Isotria 

 vertidllata 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. 

 {Ibidium lU. 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 soU; common. 



S. lucida (H. H. Eaton) Ames. — (Ibidium planiagineum 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 Family. 

 POPULUS. Poplar. 



P. alba L. White Poplar. — Occasionally spreading from culti- 

 vation. 



