622 



Rvdderg : The American Species of 



lanceolate, spreading : petals lanceolate, slightly shorter than the 

 sepals; lips rhombic-lanceolate, obtuse, about 5 mm. 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 



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



spur 



the whiter flowers and more rhomboid lip. . Where growing 

 together, intermediate forms are often found, perhaps of hybrid 



origin. 



Colorado. 



L. borealis is 



common from Alaska to Washington and 



Type : "Unalaschca," Chamisso. 



^ 



11. Limnorchis foliosa sp. nov. 



Stem stout and very leafy, about 3 



dm. high 



leaves linear- 



lanceolate, attenuate, 1 — 1.5 dm. long: spike short and dense, less 



than 1 dm. long ; bracts linear- 

 lanceolate, attenuate, about three 

 times as long as the flowers : these 

 about 15 mm. long, white : upper 



sepal broadly linear, obtuse, about 

 6 mm. long ; lateral ones narrowly 



lanceolate, about 9 mm. 



petal 



> 



Fig. 11. 



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. 



(Fi 



S- 



) 



/. 



Cocloglossinn 



bractcatum, but the flower is of the typical Limnorchis type and 

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

 and the lip less rhomboid. 



Alaska : Nagai, 187 1-2, M. IV. Harrington (Dall's Explora- 

 tion ; type in the Columbia herb.). 



12. LnixoRCHis dilatata (Pursh) Rydb.; Britton, Man. Fl. N. 



States, 294. 



1 90 1 



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

 dilatata Hook. Exot. Fl. //. 95. 1825; Platanthcra dilatata Lindl. : 

 Beck. Bot. N. & M. St. 347, in part. 1833 ; Platanthcra hyper- 



