628 



Rydberg : The American Species ok 



Fig. 19. 



Slender, about 3 dm. high : leaves oblong to lanceolate, 5-10 

 cm. long, 1-1.5 cm. wide, the lower obtuse, the upper acute : spike 



slender and lax, about i dm. long ; 

 bracts lanceolate the lower slightly 

 exceeding the flowers : these white, 

 10-12 mm. long : upper sepal broadly- 

 oval, about 4 mm. long, the lateral 

 ones linear-lanceolate, acute : petals 

 linear-lanceolate ; lip linear, obtuse, 

 6—7 mm long ; spur clavate, only 

 slightly curved, a little shorter than 

 the lip. (Fig. 19.) 

 This resembles L. stricta in the linear lip and the lax spike, 

 but has white flowers and slender spur. Watson confused the 

 two and following him, most authors have used the name Habc- 

 naria gracilis for L. stricta. No one who has seen Lindley's type 

 could confuse the two. 



Type: "In ora occidciita/i Ainericac scptcntricmalis, Menzics ; 

 Observatory inlet. Herb. Hooker {hab. s. sp. comm. eel. Menzies)." 

 Alaska: Back Bay, 1895, M. IV. Gorman, f,2 (in Colum- 

 bia Herbarium) ; Sitka, i8cji, IV. G. Wright {1359) (?)• 

 Subarctic America: 186 1-2, /. S. Onion. 



19. Limnorchis convallariaefolia (Lindl.) 



Platanthera convallariaefolia Lindl. Gen. & Sp. Orchid. PL 287. 

 1835; Platanthera hyperborea (i,VA.\. cojiv all ariaef alia Kraenzlin, 

 Orch. Gen. et Sp. 640. 1899. 



Stem slender, about 3 dm. high : leaves 

 oblong-lanceolate or oblanceolate, 4-8 cm. 

 long, 1-2 cm. wide, the lower obtuse, the 

 upper acute : spike short, less than i dm. 

 lone ; bracts lanceolate or linear-lanceolate, 

 equalling or the lower exceeding the whitish 

 flowers : upper sepal almost orbicular or 

 broadly ovate, 3-4 mm. long ; lateral ones 



lanceolate, obtuse : petals lanceolate, acute ; lip linear, about 6 

 mm. long, obtuse ; spur filiform, curved, almost equalling the lip. 

 (Fig. 20.) 



This is closely related to L. gracilis, and differs scarcely in any 

 respect except that the flowers are smaller and the spur is longer 

 and more slender. It was described from specimens collected by 



Fig. 20. 



