NATURAL ORDER OF ORCHIDEJE. 



161 



N. B. Epipactis is very like the foregoing genus 

 (Arethusa), but the peculiar form of the 

 flower in particular, as well as the manner 

 of growth by which the genus is distin- 

 guished, do not admit of their being united. 



This genus is one of Haller's, and most of the 

 species, which he refers to it, are also 

 retained here. The difference in the anther 

 distinguishes it from the genus Ophrys. 



Species* 



a. labello lamina integra. 

 Epipactis latifolia L. 



Serapias latifolia L. 

 palustris 



Serapias Iongi- 

 folia L. 

 microphylla 



*> 



Serapias micro- 

 phylla L. 

 pallens 



Serapias grandi- 

 flora L. 



S. lancifolia Ehrh. 

 E. ensifolia. 



Ser.grandifloravar.L. 



Ser. ensifolia. Ehrh* 

 rubra 



Serapias rubra L. 

 erecta 



Serap. erecta 

 Th. jap. 



