ORCHID FA.AIILY 



473 



3. Limnorchis sparsiflora ( S. \\'ats.) 

 Sparsely Flowered Bog Orchid. 



Fig. 



Rydb. 

 1155. 



Habcnaria sl^arsiflora S. Wats. Proc. Am. Acad. 12: 276. 1877. 

 Limnorchis la.xiftora Rydb. Bull. Torrey Club 28: 630. 1901. 

 Limiioichis sparsiflora Rydb. Bull. Torrey Club 28: 631. 1902. 



Stem slender. 4-6 dm. high. Lower leaves oblanceo- 

 late, obtuse, 8-10 cm. long. 10-15 mm. wide, the upper 

 linear-lanceolate, acute : spike slender and lax, 1-2 dm. 

 long, few-flowered ; bracts linear-lanceolate ; flowers 

 greenish, 10-12 mm. long; upper sepals broadly obovate, 

 obtuse, about 4 mm. long, the lateral broadly lanceolati', 

 acutish : lip linear, obtuse, about 6 mm. long ; spur slight- 

 ly clavate, a little longer than the lip. 



Wet springy places. Transition and Canadian Zones; Washing- 

 ton, Oregon to northern Lower California and New Mexico. Type 

 locality: near Mariposa Grove, Yosemite National Park, California. 



5. Limnorchis thurberi (A. Grav) 

 Rydb. 



Thurber's Bog Orchid. Fig. 1157. 



Habenaria thi4rbcri A. Gray, Proc. Am. Acad. 7: 

 389. 1868. 



Limnorchis thurberi Rydb. Bull. Torrey Club 28: 

 624. 1901. 



Stems stout and leafy, 4-6 dm. high, from 

 elongated fusiform tubers. Leaves lanceo- 

 late to linear-lanceolate, acute, 1-2 dm. long; 

 spike dense, 10-20 cm. long ; flowers white 

 16-20 mm. long; upper sepal ovate, obtuse, 

 the lateral lanceolate, acute ; lip 7-8 mm. long, 

 lanceolate, obtuse, the dilated p'ortion ovate ; 

 spur filiform, curved, about two-thirds longer 

 than the lip. 



Bogs and borders of streams, Transition and 

 Canadian Zones; vicinity of Mount Shasta to north- 

 ern Lower California and New jMexico. Type lo- 

 cality: "Arizona." 



4. Limnorchis dilatata(Pursh)Rydb. 



Boreal Bog Orchid. 



Fig. 1156. 



Orchis dilatata Pursh, Fl. Am. Sept. 588. 1814. 

 Habenaria dilatata Hook. Exot. Fl. pi. 95. 1825. 

 Limnorchis dilatata Rydb. Bull. Torrev Club 28: 



622. 1901. 

 Habenaria borcalis Cham. Linnaea 3: 28. 1828. 

 Limnorchis borealis Rydb. Bull. Torrey Club 28: 



621. 1901. 



Stems leafy, 4-8 dm. high, from thick, 

 elongated, fusiform tubers. Leaves lanceo- 

 late, the lower obtuse, the upper acute, 7-20 

 cm. long ; spike 1-2 dm. long, often rather 

 denselj' flowered; flowers white, 10-14 mm. 

 long; upper sepal ovate, obtuse, 4-5 mm. 

 long, the lateral oblong-lanceolate ; lip 

 rhombic-lanceolate, obtuse, about 5 mm. 

 long; spur usually shorter than the lip, 

 more or less clavate. 



Bogs and springy places, Canadian Zone; Alaska 

 to Mount Hood, Oregon, east to New Foundland, 

 New York aild Nebraska. Type locality: Labrador. 



