34 BOTANY OF MICHIGAN 



ground from Bay County to Mackinac Island, Mackinac County. Fre- 

 quent. 



Habenaria orbiculata (Pursh) Torr. Large round-leaved orchis. Rich 

 shaded ground from Bay County to Mackinac Island, Mackinac County. 

 Apparently infrequent. 



Habenaria lacera (Michx.) R. Br. Ragged fringed orchis. In open 

 ground from Bay County to Mackinac Island, Mackinac County. 

 Frequent. 



Habenaria psycodes (L.) Sw. Smaller purple-fringed orchis. Wet 

 places and in damp meadow-like ground. Frequent throughout. 



Pogonia ophioglossoides (L.) Ker. Rose pogonia. Wet boggy ground. 

 Occasional throughout. 



Calopogon pulchellus (Sw.) R. Br. Calopogon. Grass pink. In boggy 

 open ground from Bay County to Mackinaw City, Cheboygan County. 

 Apparently infrequent. 



Arethusa bulbosa L. Arethusa. In an open bog near the life saving 

 station above Cheboygan, Cheboygan County. Probably frequent 

 throughout. 



Spiranthes gracilis (Bigel) Beck. Slender ladies' tresses. Dry open 

 ground. Occasional throughout. Probably often overlooked. 



Spiranthes cernua (L.) Richards. Nodding ladies' tresses. Bogs and 

 damp open ground. Frequent throughout. Abundant in damp open 

 ground at St. Ignace and on Mackinac Island, Mackinac County. 



Epipactis repens ophioides (Fernald) A. A. Eaton. Lesser rattle- 

 snake plantain. Rich woods from Alpena, Alpena County to St. Ignace, 

 Mackinac County. Apparently infrequent. 



Epipactis tesselata (Lodd.) A. A. Eaton. Checkered rattlesnake plan- 

 tain. In damp rich woods on Mackinac Island, Mackinac County. Ap- 

 parently infrequent. The late Prof. C. F. Wheeler noted this plant in 

 Michigan as early as 1901. 



Epipactis decipiens (Hook.) Ames. Menzies' rattlesnake plantain. 

 In rich shaded ground about St. Ignace and on Mackinac Island, Macki- 

 nac County. Apparently infrequent. 



Listera convallarioides (Sw.) Torr. Broad-lipped twayblade. Damp 

 rich shaded ground on Mackinac Island. Plentiful. Apparently in- 

 frequent. 



Corallorrhiza trifida Chatelain. Early coral-root. In rich shaded 

 ground about St. Ignace and abundant on Mackinac Island, Mackinac 

 County. Noticed from Bay County to Mackinac Island. 



Corallorrhiza maculata Raf. Large coral-root. Usually in rich shaded 

 ground. Noticed as occasional from Alpena to St. Ignace. Very abun- 

 dant on Mackinac Island, Mackinac Count}^. 



Corallorrhiza striata Lindl. Striped coral-root. Noticed from near 



