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. Rnsby (type 

 in herb. Columbia Univ.). 



14. LiMNORCHis LEPTOCERATiTis Rydb. Bull. N. Y. Bot. Garden, 



2 : 162. 1901 



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

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



cm. 



long, 



I -I.; cm. wide, the 



upper 



linear-lanceolate, acute : spike short, less 

 than I dm. long ; bracts linear-lanceo- 

 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. dilatata and L. fra- 

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

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

 the spur is different. 



Yukon Territory : Bennett City, 1899, R. S. JVi//iams {type 

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



Alaska: Unalaska, 1891./. J/. Macon n : southern Alaska, 

 1883,/. Albert Rudkin. 



British Columbia: Tulameen River, 1900, /. F. Kcuip. 

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

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

 rhombic or oval dilatation near the base ; spur more than y.^ longer 

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



15. Limnorchis Thurberi (A. Gray) Rydb. 



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



Habcnaria IcucostacJiys S. Wats. Bot. Cal. 2 : 134, in part. 1880 ; 



Coville, Cont. U. S. Nat. Herb. 4: 201. 1893 ; Platanliicra Jiypcr- 



borca d var. Iciicostacliys Kraenzlin, Oich. Gen. ct Sp. 640, in part. 



1899. 



