606 RvDBERG : The American Species of 



taken out of Plataiithcra and Gyninadcnia. I therefore described 

 in my Catalogue of the Flora of Montana the new genera Lysiclla 

 ^.nd Litniwrchis diwd in Dr. Britton's Manual Gymnadcniopsis* In 

 the latter I also reestablished BlepJiariglottis Raf In the Bulletin 

 of the Torrey Botanical Club,t I added another genus, Pipcria. 

 Of 'these, no species belonging to Gyninadoiiopsis, Bephariglottis 

 or Pipcria are mentioned by Pfitzer, which shows that he was not 

 well acquainted with these- plants. 



This revision is based on the material found at the New York 

 Botanical Garden together with a few specimens cited from the 

 Canby Herbarium. A few of the Habcnariae, described from 

 Mexico and Central America may belong to Liiniiorchis or Pipcria. 

 I have not seen, however, any species from there referable to either 

 genus, but as several are unknown to me I have limited my work 

 to the North American species growing north of Mexico. One of 

 the Siberian specimens in the Columbia University herbarium is 

 evidently a Liiniiorchis, but as it is wrongly named and rather 

 scrappy, I have left it without consideration. 



The illustrations are drawn by the writer and represent two 

 views of each species on a scale twice the natural size. 



LIMNORCHIS Rydb. Mem. N. Y. Bot. Card, i: 104. 1900 



Leafy-stemmed plants with elongated fusiform root-like tubers 

 and fleshy-fibrous roots : flowers whitish or greenish or tinged with 

 purple ; upper sepal ovate to almost orbicular, erect, 3— 7-nerved 

 but usually 5 -nerved ; lateral sepals from linear to ovate-lanceolate, 

 ireQ from the lip, 3-nerved, seldom 4— 5-nerved, spreading or often 

 somewhat reflexed ; upper petals erect, usually slightly shorter 

 than the upper sepal, from narrowly to broadly lanceolate, 3-nerved, 

 oblique at the base and semi-cordate, that is cordate on the lower 

 side ; lip entire, usually indistinctly nerved, flat or slightly con- 

 cave, reflexed, free, not clawed, from linear to rhombic-lanceolate, 

 obtuse ; column short and thick ; anther-cells parallel, opening 

 in front ; stigma broadly triangular ; ovary sessile, in fruit elon- 

 gated elliiDSoid. 



The mode of propagation in many orchids is very peculiar. 

 Near the base of the stem is produced a short offset, tuber-, cbrm- 

 or root-like in appearance, usually fleshy. In the upper portion 



* Wrongly printed as Gymnandeniopsis. 

 •j- 28 : 269. 1901. 



