ORCHIDACEAE. 



3. LYSIELLA Rydb. 



i. Lysiella obtusata (Pursh) Rydb. In boggy places in the woods from 

 Newf. to Alaska, N. Y. and Colo. Alt. 8500-11,500 ft. Chicken Creek, West 

 La Plata Mountains; North Park; Clear Creek; camp on Little Beaver 

 Creek; bank of Michigan, North Park. 



4. LIMNORCHIS Rydb. BOG ORCHID. 



Connective of the anther narrow ; anther cells therefore close together ; spur not 



longer than the tip. 

 Flowers greenish or purplish. 



Spur Y^-Yz as long as the lip, very saccate. 



Lip linear or nearly so, 5-7 mm. long ; ovary slightly curved ; spike elon- 

 gated, i. L. strict a. 

 Lip lanceolate, fleshy 4-5 mm. long ; ovary strongly curved ; spike usually 

 short. 2. L. pitrpurascens. 

 Spur almost equalling the lip, scarcely saccate. 3. L. viridiflora. 

 Flowers whitish. 4. L. borealis. 

 Connective of the anther broad ; anther cells therefore distant ; spur much ex- 

 ceeding the tip. 5- L. la.viflora. 



1. Limnorchis stricta (Lindl.) Rydb. In bogs from Mont, to Alaska, Colo, 

 and Wash. Alt. 8500-10,000 ft. Upper La Plata; Jack Brook; Twin Lakes; 

 Manitou. 



2. Limnorchis purpurascens Rydb. On rich brook-banks in the mountain 

 woods of Colo. Alt. 7500-11,000 ft. Gnnnison; Parlin; Iron Mountain; 

 Georgetown ; Como ; mouth of Cheyenne Canon ; Barnes' Camp ; camp on 

 Little Beaver Creek ; swamp above Beaver Creek ; Franklin ; mountains north 

 of Steamboat Springs. 



3. Limnorchis viridiflora (Cham.) Rydb. (Habenaria hyperborea S. Wats. 

 and of Coult. Man.; not R. Br.) In bogs from Alb. to Alaska and Colo. 

 Alt. 6500-10,000 ft. McCoy; Ouray; Gunnison; La Veta; Cascade; Piedra; 

 Wahatoya Creek ; Georgetown ; West La Plata Mountains ; Clear Creek ; 

 Barnes' Camp ; mountains above Ouray ; mountain north of Steamboat 

 Springs. 



4. Limnorchis borealis (Cham.) Rydb. (Habenaria dilatata of Coult. 

 Man.) In bogs from Mont, to Alaska, Colo, and Wash. Alt. 8500-10,000 

 ft. Chambers' Lake ; Columbine ; Veta Pass ; Graymont ; Gore Pass ; sum- 

 mit of North Park Range. 



5. Limnorchis laxiflora Rydb. In bogs from Ore. to Colo, and Utah. 

 Uncompahgre Mountains ; Los Pinos ; Franklin. 



5. PIPERIA Rydb. 



i. Piperia unalaschensis (Spreng.) Rydb. (Habenaria Unalaschcnsis S. 

 Wats.) In damp rich woods from Mont, to Alaska, Colo, and Calif. Alt. 

 about 8500 ft. South Boulder Peak. 



6. EPIPACTIS R. Br. HELLEBORINE. 



i. Epipactis gigantea Dougl. In rich woodlands from Mont, to B. C, 

 Western Tex. and Calif. Alt. about 8500 ft. Glenwood Springs. 



