632 



Rydberg : The American Species of 



linear-lanceolate, acute, a little shorter than 

 the upper sepal ; lip linear, obtuse, about 

 lO mm. long; spur filiform, about 15 mm. 

 long. (Fig. 25.) 



This is characterized by its large flowers 

 and reduced leaves. 



Type : " On dry southward slopes of the 

 Finos Altos Mountains, New Mexico, in 

 i88o." 



New Mexico : White Mountains, 1 897, 

 E. O. Wooton, 5./^ ; Finas Altos Mountains, 

 E. L. Greene. 



Mexico: State of Chihuahua, Sierre Madre, 1887, C. G. 

 Pringle, IJ74. 



Fig. 25. 



FIPERIA Rydb. Bull. Torn Club, 28: 269. 1901 



Somewhat leafy-stemmed plants, but the leaves are usually 

 near the base and withering at or before the anthesis, the stem- 

 leaves being reduced and bract-like : tubers spherical or rounded 

 ellipsoid; flowers greenish or white ; sepals and petals i-nerved 

 or very obscurely 3-nerved ; the upper sepal ovate or lanceo- 

 late, erect ; the lateral ones spreading, linear to lanceolate, their 

 bases united with the claw of the lip ; upper petals free, lanceolate 

 or linear-lanceolate, oblique, but not cordate ; the blade of the lip 

 linear-lanceolate to ovate, obtuse, truncate or hastate at the base, 

 concave but with a longitudinal low ridge in the middle produced 

 by the undulation of the lip ; the claw, if it can be called so, united 

 with the bases of the lower sepals, bordered with an erect margin 

 which connects the lip with the column ; anther cells unusually 

 large for the size of the flower, parallel, opening nearly laterally : 

 stigma a small beak in the angle between the anther-cells ; ovary 

 sessile, ellipsoid in fruit. 



The principal differences between Limnorchis and Piperia are 

 the following : 



Limnorchis 



FlPERIA 



Tubers rounded. 



Tubers elongated fusiform, 

 root-like. 



Stem leafy ; leaves remaining Stem leafy at the base ; leaves 

 until fruit is set. withering at or before anthesis. 



