LlMNORCHJS AND PlPERIA NORTH OF MEXICO 



617 



Stem 2-5 dm. high : tubers elongate fusiform, 5-7 mm. thick : 

 lower leaves 5-15 cm. long, 2-3 cm. wide, oblanccolate, obtuse ; 

 the upper lanceolate, acute : spike short 

 and dense ; bracts linear-lanceolate, the 



lower 

 flowers 



slightly 



10 



exceeding the flowers : 



12 mm. 



long, 



light 



green : 



upper sepal broadly ovate, erect, 3—4 



lateral ones 5-6 mm. long, 



mm. long ; 



Fig. 4 



lanceolate, acutish or obtuse, spreading ; 

 petals erect, lanceolate, acute, slightly 

 shorter than the upper sepal ; lip lan- 

 ceolate, obtuse, less than 5 mm. long ; spur decidedly clavate, 

 curved, about equalling the lip. (Fig. 4.) 



This species is closely related to the true L. hyperborea % and is 

 its representative in the west. It differs only in the lighter green 

 flower and the thicker and shorter spur. It is also related to Z. 

 borealis on the other hand, and it is no wonder that Chamisso 

 made it a variety *of that species, as it differs only in the green 

 flowers and more saccate spur. Intermediate forms are met with ; 

 these are perhaps of hybrid origin. L. viridiflora is common in 

 the Rocky Mountain regions and the Cascades. Its range ex- 

 tends from southern Alaska to North Dakota, central Nebraska 

 and Colorado, and is the common plant of the West, known as 

 Habenaria hyperborea. Numerous specimens have been examined. 



Type : " Unalaschca," Chamisso. 



5. Limnorchis major 



PlatanthcrcT Koenio ii 



^35. Not Orchis 



Keenig 



Lindley, Gen. & Sp. Orchid. PI. 286. 

 'i Retz. 1779; Plat anther a dilatata 



Torr. Fl. N. Y. 2 : 276, in part. 1843 ; 

 Habenaria hyperborea Gray, Man. Ed. 

 5: 500, in part. 1867; Platanthera 

 hyperborea ft major Lange, Consp. Fl. 



Groenl. 118. 1880; 

 borea Rydb. ; Britto 



1901, in part. 



Man 



Jiyper- 

 N. St. 



294 



M-4c 



tlG. 5. 



m. wide 



Stem stout, 2-6 dm. 



high : 



leaves 



lanceolate, mostly acute, 5-30 cm. long, 

 : spike dense, 5-15 cm. long; bracts lanceolate, 

 th e lower^slightly exceeding the flowers: flowers 12-14 mm. 

 lor >g: upper sepal broadly ovate, obtuse, 5 mm. long; the 



