LlMNORCHIS AND PlPERIA NORTH OF MEXICO 



621 



twice as long as the flowers : flowers purplish, about 12 mm. long : 

 upper sepal ovate, obtuse, 4-5 mm. long ; the lateral ones oblong : 

 petals equalling the sepals, broadly 

 lanceolate ; lip about 5 mm. long ; 

 spur fully 10 mm. 



( Fi S- 9-) 



This species is not closely re- 

 lated to any of the other species. 

 The type specimens were labelled 



long, 



filiform. 



Habenaria gracilis Wats. With 

 this, i. e. } L. stricta it has scarcely 



Fig. 9. 



anything common except the color of the flowers and such char- 

 acters as are found in all species of Limnorcliis. 



L. Bchriiigiana 



A 



* 



same region has been. 



Asia: Behring Island, 1891, British Behring Sea Commission, 



143 (type in herb. Columbia Univ.). 



§ Dilatatae: Plants usually middle sized: flowers white or in 

 the first species yellowish-white ; lip lanceolate, more or less dis- 

 tinctly rhombic dilated near the base ; spur equalling or slightly 

 longer than the tip ; connective narrow. 



1 0/ Limnorchis borealis (Cham.) 



Habenaria borealis Cham. Linnaea, 3 : 28. 1828 ; Platanthcra 

 dilatata Lindl. Gen. and Sp. Orchid. PI. 287; in part. 1835; 

 Habenaria dilatata Coult. Man. Rocky Mts. 342. 1885; 



Habenaria dilatatift 



nis Rydb. Bull. Torr. Club, 24: 189. 

 1897 ; Plata nt he ra Jiyperborea y var. dilatata 

 Kraenzlin, Orch. Gen. et Sp. 640. 1899, in 

 part ; Limnorchis dilatatiformis Rydb. Mem. 

 N. Y. Bot. Garden, x: 105. 



1900. 



Tall and leafy, 4 



Fig. 10. 



-8 dm. high : tubers 

 elongated fusiform, 5-8 mm. thick : lowest 

 leaves oblanceolate and obtuse ; the rest 

 lanceolate, acute, 5-15 cm. long, 1.5-2.5 

 cm. wide: spike often rather dense, 1-2 dm. long; bracts lan- 

 ceolate, the lower often much exceeding the flowers : flowers 

 10-14 mm. long, white or sometimes yellowish or greenish white : 

 upper sepal ovate, obtuse, 4-5 mm. long ; the lateral ones oblong- 



