246 PROCEEDINGS: BOSTON SOCIETY NATURAL HISTORY. 



Great Barrington (Walters); New Marlboro (Walters). Possibly 

 occurs throughout the County, as it is easily overlooked unless in 

 flower. 



CALOPOGON. 



{Limodorum 111. Fl. ed. 2.) 



C. pulchellus (Sw.) R. Br. Grass Pink. — Borders of bogs; oc- 

 casional in the valley. Williamstown ; Pittsfield; Stockbridge; 

 Great Barrington (Walters); New Marlboro; Sheffield (Walters). 



CORALLORRHIZA. Coral Root. 



C. maculata Raf. — Rich woods; common. 



C. trifida Chatelain.— (C. CoraUorhiza 111. Fl. ed. 2.) 



Rich woods, wet slopes and shaded peat bogs; frequent. 



CYPRIPEDIUM. Lady's Slipper; Moccasin Flower. 



C. acaule Ait. Pink Lady's Slipper. — (Fissipes acaule 111. Fl. 

 ed. 2.) 



Dry woods and knolls in swamps; frequent. Altitude 1900 feet 

 (Savoy). 



C. arietinum R. Br. Ram's Head Lady's Slipper. — Great 

 Barrington (Miss Helen Brown). 



C. hirsutum Mill. Showy Lady's Slipper. — (C. reginae 111. Fl. 

 ed. 2.) 



Cold swamps; frequent in the valley. 



forma album (Sweet), comb. nov. — ( Vid. Brit. Fl. Gard. 3: 240, 

 1827-29.) Flowers pure white. 



Williamstown (Pres. Carter) ; Becket (specimen in Gray Herbarium) . 



C. parviflorum Salisb. Smaller Yellow Lady's Slipper. — 

 Rich woods and borders of swamps; frequent. 



var. pubescens (Willd.) Knight. Larger Yellow Lady's Slip- 

 per. — (C. parviflorum 111. Fl. ed. 2 in part.) 



Rich woods; frequent. 



Specimens intermediate between C. parviflorum and the var. 

 pubescens have been collected at White Oaks, Williamstown 

 (Churchill). 



