622 



RvDBERG : The American Species of 



lanceolate, spreading : petals lanceolate, slightly shorter than the 

 sepals; lips rhombic-lanceolate, obtuse, about 5 rnrn. long; spur 

 usually shorter than the lip, and more or less clavate. (Fig. 10.) 



This species represents L. dilatata in the Rocky Mountain re- 

 gion, but differs in the smaller flowers and shorter, more clavate 

 spur. It also approaches L. viridiflora, from which it differs in 

 the whiter flowers and more rhomboid lip. Where growing 

 together, intermediate forms are often found, perhaps of hybrid 

 origin. L. borealis is common from Alaska to Washington and 

 Colorado. 



Type : "Unalaschca," Chamisso. 



Fig. II. 



1 1 . Limnorchis foliosa sp. nov. 



Stem stout and very leafy, about 3 dm. high : leaves linear- 

 lanceolate, attenuate, i — 1.5 dm. long: spike short and dense, less 



than I dm. long ; bracts linear- 

 lanceolate, attenuate, about three 

 times as long as the flowers : these 

 about 1 5 mm. long, white : upper 

 sepal broadly linear, obtuse, about 

 6 mm. long ; lateral ones narrowly 

 lanceolate, about 9 mm. : petals 

 narrowly linear-lanceolate, attenu- 

 ate ; lip about 10 mm. with an oval 

 base and an almost linear lower 

 half, obtuse : spur about the length 

 of the lip, filiform, not at all clavate. 

 (Fig. II.) 



This species has the habit o{ Pcnilaria flava and Cocloglossuui 

 bractcatimi, but the flower is of the typical LiinnorcJns t}^pe and 

 places it nearest to L. dilatata. The flowers, however, are larger 

 and the lip less rhomboid. 



Al.\ska : Nagai, 187 1-2, M. \V. Harrington (Ball's Fxplora- 

 tion ; type in the Columbia herb.). 



12. LiMXOKCHis DiL.vr.ATA (Pursh) Rydb.; Britton, Man. Fl. N. 



States, 294. 1 90 1 



OrcJiis dilatata Pursh, Fl. Am. Sept. 588. 18 14; Habcnaria 

 dilatata Hook. Exot. Fl.//. gj. 1825 ; Plata ntlicra dilatata Lindl.; 

 Reck. Rot. N. & M. St. 347, in part. 1833 ; Platanthcra hyper- 



