610 Rydberg : The American Species of 



fers mainly in the spur. It is not at all the plant that has gone 

 under the name Habenaria gracilis in the United States. This is 

 the following species, belonging to another group of the genus. 

 P. gracilis is confined to Alaska and subarctic America. 



P. stricta is the tall species, with greenish or purplish flowers, 

 linear lip and short saccate spur, that Watson and others have 

 called Habenaria gracilis. This is common in the Columbia 

 region and the valleys of the Rockies as far south as Colorado. 



P. graminea resembles P. gracilis in habit, but the leaves are. 

 narrower and the lip dilated at the base, the spur is longer and 

 more clavate. Its home is Alaska. It was first collected by 

 Menzies, and later by Miss Cooley and by Gorman. A single 

 specimen from the lower St. Lawrence region evidently is to be 

 referred here also. 



Hooker's Flora Boreali-Americana contains the same species 

 as Lindley's Genera. 



Watson, in the Botany of California, has in his second section 

 of Habenaria, which section would correspond to Limnorchis, the 

 following species : H. Icucostachys (Lindl.) S. Wats., H. sparsiflora 

 S. Wats., H. pcdicellata S. Wats., H. hyperborea R. Br., H. Copcri 

 S. Wats., and H. gracilis S. Wats. 



In H. Icucostachys, he includes H. Tkiirberi K. Gray,* but the 

 flowers of this species are greener, the dilated portion of the lip 

 oval instead of rhombic and the spur longer. Watson states the 

 characters of Gray's H. TImrbcri were mostly drawn from the vari- 

 ety mentioned (/. e., the same as H. sparsiflora), a statement which 

 is not correct. 



H. sparsiflora Wats, is a good species, which, together with H. 

 brevifolia Greene t and two more species, constitute a distinct 

 group, perhaps a subgenus, distinguished b)' the very broad and 

 thin connective. 



H. pcdicellata Wats. /. c. I have not seen, but from the descrip- 

 tion it cannot belong to Limnorclds. 



H. hyperborea of the Botany of California is the same as H. 

 borcalis [i viridiflora Cham, and not O. hyperborea L. 



* Proc. Am. Acad. 7 : 389. 1868. 

 t I'mc. .Am. Acail. 12: 276 1876. 

 J B .t (Jaz. 7 : 218. 1881. 



