LiMNORCHlS AND PiPERIA NORTH OF MEXICO 



621 



1^^ 



twice as long as the flowers : flowers purplish, about I2 mm. \om 

 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 ID mm. long, filiform. 

 (Fig. 9) 



This species is not closely re- 

 lated to any of the other species. 

 The type specimens were labelled 

 Habeiiaria gracilis Wats. With 

 this, /. e., L. stricta it has scarcely 

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

 acters as are found in all species of LimnorcJiis. L. Bchringiana 

 has not been found in North America but I mclude it in here, as it 

 would] likely be found in Alaska, as L. convallanaefolia from the 

 same region has been. 



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

 i^j (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. 



10. Limnorchis borealis (Cham.) 

 Habcnaria borealis Cham. Linnaea, 3 : 28. 1828 



Plataiithera 



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

 Habcnaria 

 Habcnaria 



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

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

 1897 ; Platanthera liypcrborca y var. dilatata 

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

 part ; Limnorchis dilatatiformis Rydb. Mem. 

 N. Y. Bot. Garden, i: 105. 1900. 



Tall and leafy, 4-8 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 

 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- 



FiG. 10. 



cm. 



wide 



