ORCHIDACE^ 



Plate 51 : Spiranthes saltensis 

 1, labellum; 2, petal; 3, lateral sepal; 4, upper 

 sepal. All the parts natural size, the sepals, 

 petal, and labellum having been traced through 

 transparent paper on the stage of a dissecting- 

 microscope. 



[ ^3] 



