245] FLORA OF BOULDER, COLORADO 97 



108. PERAMIUM Salisb. Rattlesnake plantain. 



284. P. ophioides (Fernald) Rydb. Snake-mouth rattle- 

 snake plantain. 



Densely wooded canons on north slope of Green Mt., very 

 rare, 7000-8100 ft. (Daniels, 827). 



Prince Edward's Island to South Dakota; North Car- 

 olina to Colorado. 



109. ACROANTHES Raf. Adder's mouth. 



285. A. monophylla (L.) Greene [Microstylis monophylla 

 (L.) Lindl.]. One-leaved adder's mouth. 



Deep canons on north slope of Green Mt., very scarce, 

 6500-8100 ft. (Daniels, 342). 



Quebec to Minnesota; Pennsylvania to Colorado. 



110. CYTHEREA Salisb. Calypso. 



286. C. bulbosa (L.) House. [Calypso borealis Salisb.]. 

 Northern calypso. 



Nederland, Boulder County, 8263 ft. (Miss Zora Phillips), 

 Labrador to Alaska; Maine to California: Europe. 



111. CORALLORHIZA R. Br. Coralroot. 

 286^. C. ochroleuca Rydb. Yellow coralroot. 

 Redrock lake, loioo ft. (Ramaley and Robbins). 

 Nebraska to Colorado. 



287. C. Corallorhiza (L.) Karst. [C. innata R. Br.]. Early 

 coralroot. 



Canon in mesa at foot of Flagstafif Hill, only two plants, 

 5700-5800 ft. (Daniels, 122). Also at Caribou, loooo ft. 

 (Rydberg). 



Nova Scotia to Alaska; Georgia to Colorado and 

 Washington. 



288. C. multiflora Nutt. Large coralroot. 



A solitary cluster of plants under conifers at the Royal 

 Arch at base of the Flat-irons, 6200 ft. (Daniels, 229). Also 

 on North Boulder Peak (Rydberg). 



Nova Scotia to Alaska; Florida to California. 



