624 Rvdberg : The American Species of 



The two sheets of the orginal collection in the Columbia Herbarium 

 are the only ones seen. 



Vermont: Willoughby Mountain, 1892, H. H. Rusby (type 

 in herb. Columbia Univ.). 



14. LlMNORCHiS leptoceratitis Rydb. Bull. N. Y. Bot. Garden, 



2 : 162. 1901 



Stem slender, 2-4 dm. high : tubers slender, slightly thicker 

 than the fleshy fibrous roots : lower leaves oblong, obtuse, 4-8 



cm. long, 1-1,5 cm. wide, the upper 

 linear-lanceolate, acute : spike short, less 



than 1 dm. long • bracts linear-lanceo- 



1 

 late, the lower somewnat longer than 



the white flowers : sepals 3-4 mm. long, 



lanceolate : petals linear or narrowly 



linear-lanceolate, about equalling the 



sepals ; lip lanceolate, somewhat rhombic, 



dilated at the base ; spur very slender, filiform, strongly curved 



forward, a little exceeding the lip. (Fig. 14. 



This is nearest related to the eastern L. di I at at a and L. fra- 

 grans, but differs in the smaller size, smaller flowers and shorter 

 leaves. In habit it resembles most a depauperate L. borealis, but 

 the spur is different. 



Yukon Territory : Bennett City, 1899, R. S. William (type 

 in herb. N. Y. Bot. Card.). 



Alaska: Unalaska, 1891, /. 

 3, /. Albert Rudkin. 



J. R Kemp 



§ Leucostachvae : Tall and stout plants : flowers pure white or 

 slightly greenish in L. ThurbcH ; lip lanceolate with a more or less 

 rhombic or oval dilatation near the base ; spur more than % l° n g er 

 than the tip ; connective narrow : spike long and dense. 



1 5 . ' Limnorchis Thurberi (A. Gray) Rydb. 



Habenaria Thurberi A. Gray, Proc. Am. Acad. 7 : 389. 186S; 

 Habenaria leucostachys S. Wats. Bot. Cal. 2 : 134, in part. 1880 ; 

 Coville, Cont. U. S. Nat. Herb. 4 : 201. 1893 ; Platanthera hyfer- 

 borea o var. leucostachys Kraenzlin, Orch. Gen. et Sp. 640, in part 

 1899. 



