210 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



Spur clavate, usually shorter than the lip 4. L. dilatata. 



Spur not clavate, longer than the lip. 



Spike moderately dense ; spur acutish 5. L. leucostachys. 



Spike very dense ; spur obtuse 5a. L. leucostachys robusta. 



1. lamnorchis stricta (Lindl.) Rydberg, Mem. N. Y. Bot. Gard. 1 : 105. 1900. 

 PlatarUhera stricta Lindl. Gen. & Sp. Oix-h. 288. 1835. 



Habenaria gracilis Wats. Proc. Am. Acad. 12: 277. 1877. 



Type locality: " In America Ixireali-occidentali." Collected by Douglas. 



Range: Alaska to Washington and Colorado. 



Specimens examined: Clallam County, Elmer 2549; Mount Rainier, Smith 874; Piper 

 2094; Cascade Mountains, latitude 49°, Lyall in 1859; Silverton, Bouck; Seattle, Piper, 

 June, 1889; Olympia, Ilemlerson, May, 1892; upper Nisqually Valley, Allen 70; Mount 

 Adams, Suksdorfil; Wind River, Fleti 110; Skagit Pass, Lake tfc Hull 624 in part; Ellens- 

 burg, Whited 5.'J2; Stampede Pass, Henderson, October, 1892; Simcoe Mountains, Howell 

 302; Lake Wenache, Sandberg d' Leiberg 647; ilwaco. Piper 5001; Kreager 189; Green 

 River Hot Springs, Pijier 415. 



Zonal dlstribition: Transition to Hudsonian. 



2. Linmorchis viridiflora (Cham.) Rydberg, Bull. Torr. Club 28: 616. 1901. 

 Habenaria borealis inridijlora Cham. Linnaea 3: 28. 1828. 



Type ukjality: "In Unalaschka." 

 Range: Alaska to Washington and Colorado. 

 Specimens examined: Spokane Count}-, Suksdorf 452. 



Perhaps not distinct from L. hy]>erborea (L.) Rydb. {Habenaria hyperborea R. Br.), to 

 which it has In'en referred. 



3. Limnorchis laxiflora Rydberg, Bull. Torr. Club 28: 630. 1901. 

 Type locality: Coast Mountains, Oregon. 



Range: Washington and Oregon to Colorado. 



Specimens examined: Ea.stern Wa.shington, without Ux^ality, Wilkes Expedition. 



4. Limnorchis dilatata (Pursh) Rydberg in Britton, Man. 294. 1901. 

 Orchis dilatata Pursh, Fl. 2: .588. 1814. 



Habenaria dilatata Hook. Exot. Fl. 2: <. 90. 1825. 

 Habenaria borealis Cham. Linnaea 3: 28. 1828. 

 Type locality: Labrador. 



Range: Alaska to New England, Colorado, and Washington. 



Specimens examined: Olympic Mountains, Piper, August, 1895; Stevens Pass, Whited 

 1840; Mount Stuart, Elmer 1213; Mount Adams, Suksdorf 2298. 



6. Liixxnorchis leucostachys (Lindl.) Rydberg, Mem. N. Y. Bot. Gard. 1: 106. 1900. 



Plalonthera leucostachys Lindl. Gen. & Sp. Orch. 288. 1835. 



Habenaria leucostachys Wats. Bot. Cal. 2: 134. 1880. 



Type li cality: "In ora occidentali Americae septentrionalis." Collected by Douglas. 



Range: Alaska to California and Utah. 



Specimf.vs examined: Clallam County, Elmer 2551; Blue Mountains, Lake cfe Hull, 

 July, 1892: Waitsburg, Horner 188; Salmon River, Blue Mountains, Homer 462. 



Zonal pistribltion: Transition. 



6a. liiniuorchis leucostachys robusta Rydberg, Bull. Torr. Club 28: 626. 1901. 



Type locality: "Washington." Collected by G. R. Vasey in 1889. 



Range: British Columbia to Oregon and Idaho. 



Specimens examined: Seattle, Piper 291, July, 1897; Olympia, Heller 4046; Kincaid, 

 July, 1896; Nisqually Valley, Allen 75; Skagit Pass, Lake cfe Hull 624 in part; Wenache 

 region, Tweedy, July, 1883; Mount Stuart, Sandberg cfe Leiberg 576; Ellensburg, Whited 

 532, 698; Falcon Valley, Suksdorf 1356; Marshall Junction, Piper, July 2, 1896; Mount 

 Carlton, Kreager 195; without locality, Vasey in 1889. 



Zonal ptstribution : Transition and Canadian. 



