1909] Flora of the Boston District,— IV 77 
C. trifida Chatelain. Saprophytic in damp woods and swamps; 
occasional northward, also in Purgatory Swamp, Norwood, and Cedar 
Swamp, Walpole. 
CYPRIPEDIUM. 
C. acaule Ait. Dry woods, especially pine, sometimes in swampy 
woods; common. White-flowered form occasional. 
C. hirsutum Mill. Cold swamps, Amesbury (J. W. Huntington & 
R. Dodge, 1906); Wenham (J. H. Sears, 1877 and 1885); Andover 
(J. T. Dawson, according to Robinson, Fl. Essex Co. 109. 1880); 
Reading (Miss Clymena Wakefield, according to Dame & Collins, 
Fl. Middlesex Со. 105. 1888); Danvers and Wilmington (according 
to Baldwin, Orchids of N. E. 144. 1884). 
C. parviflorum Salisb. Deep woods. Acton (J. R. Churchill, 
May 20, 1880; W. Deane, June 27, 1885); Danvers, Wenham, and 
Swampscott (J. H. Sears, 1877 and 1885); Groton (Miss H. E. 
Haynes, according to Dame & Collins, Fl. Middlesex Co. 104. 1888); 
Westford, Methuen, West Haverhill, and Canton (according to Bald- 
win, Orchids of N. E. 144. 1884). 
C. parviflorum Salisb., var. pubescens (Willd.) Knight. Woods 
and swamps. Ashland (Miss E. F. Wiggins, May, 1884); West Box- 
ford (Mrs. H. D. W., no date. Specimen in herb. N. E. Bot. Club); 
Dedham (E. H. Hitchings, June 6, 1879. Specimen in Gray Herb.); 
Holbrook (E. F. Williams et al., May 30, 1902); Norwood (А. W. 
Cheever, June 4, 1904; J. A. Cushman, May 20, 1908); Stowe (J. R. 
Churchill & W. Deane, May 30, 1886); Lexington (according to 
Baldwin, Orchids of N. E. 144. 1884). 
EPIPACTIS. 
E. pubescens (Willd.) A. A. Eaton.  Dryish woods, generally 
distributed throughout. 
E. tesselata (Lodd.) A. A. Eaton. Rich woods, occasional in 
northern sections; occurring also at Dedham, North Easton, Norwood, 
and Walpole. 
HABENARIA. 
H. blephariglottis (Willd.) Torr. Wet open woods and bogs, occa- 
sional throughout. 
