g6 UNIVERSITY OF MISSOURI STUDIES [244 



279. I. borealis (Cham.) Rydb. NORTHERN BOG ORCHIS. 

 Springs on mountainside at Eldora, 8600-10000 ft. (Dan- 

 iels, 842). 



MONTANA to ALASKA; COLORADO to WASHINGTON. 



280. L. laxiflora Rydb. LOOSE-FLOWERED BOG ORCHIS. 

 Common in deep mountain canons, 6500-10000 ft. (Dan- 

 iels, 602). 



OREGON to COLORADO and UTAH. 



105. PEPEEIA Rydb. PIPER'S ORCHIS. 



281. P. ITnalaschensis (Spreng.) Rydb. [Habenaria Una- 

 laschensis S. Wats.] ALASKAN PIPER'S ORCHIS. 



Under pines on north slope of Green Mt., very rare, 6000- 

 8100 ft. (Daniels, 470). Also on South Boulder Peak, 8500 

 ft. (Rydberg). 



MONTANA to ALASKA; COLORADO to CALIFORNIA. 



106. IBIDIUM Salisb. LADIES' TRESSES. 



282. I. B-omanzoffiamim strictum (Rydb.) Daniels. Nov. 

 comb. \Gyrostachys stricta Rydb.] NARROW - SPIKED 

 LADIES' TRESSES. 



One plant in a deep canon on the north slope of Green 

 Mt.; common in springy bogs at Eldora, 7000-10000 ft. 

 (Daniels, 769). 



NEWFOUNDLAND to ALASKA; PENNSYLVANIA to COLORADO. 



107. OPHRYS (Tourn.) L. TWAYBLADE. 



283. 0. borealis (Morong) Rydb. [Listera borealis Morong]. 

 NORTHERN TWAYBLADE. 



Deep canons on north slope of Green Mt., very rare, 6500- 

 8100 ft (Daniels, 607). 

 HUDSON BAY to MACKENZIE; COLORADO to MONTANA. 



283^2. 0. nephrophylla Rydb. [Listera nephrophylla Rydb.] 



KIDNEY-LEAVED TWAYBLADE. 



Redrock lake 10100 ft. (Ramaley and Robbins). 

 ALASKA to COLORADO and OREGON. 



