

68 



cumscribed. The genera properly belon 



Pleu 



thallid^e are, PleurothalliSy Stelis, JLepanthes, Octomeria, 

 Stenoglossum, Rcstrepia, Physosiphon, and Masdevallia ; to 

 which must be added Myoxanthus and Specklinia, if those 

 two genera can be retained. But the former I have formerly 

 ^educed to Pleurothallis, and a more extensive knowledge of 

 ae species has led me to adopt the same cone] 

 ing Specklinia, which is only characterized by 

 of the base of the lateral sepals, in which particular th 



a 



pect 



many insensible gradations that it cannot be practically 



ployed 



the species of Pleurothallis are more or less 



gibbous at the base of the lateral sepal 



Among these genera Pleurothallis is by far the most ex- 

 tensive, comprising species with considerable difference in 

 habit, and in the subordinate details of their fructification. 



As the 



do not appear to be in any way connected 



th 



the former, it seems desirable to employ for natural purposes 



the habit 



which furnish 



well marked distinc 



tions. Some of the species have long spikes of flowers, 

 considerably extending beyond the foliage; these form one 

 section. Others have the spikes visibly shorter than the 

 foliage, and form a second section. A third consists of those 



t the base of the 



section consists of 



leaf, and 



flowers are arranged in a fascicle 



spik 



Finally, a fourth 



11 species with solitary or nearly solitary flowers growing 

 ong capillary peduncles. 



Taking this mode of distribution, the species may be con- 



arranged as folio 



o 



Section I. Elo 



v. racemi foliis evidenter 



# 



longiores, v. omnino aequales. 



Iiaccmosm ; nempe pedicellis quam bracteaj evidenter 



loi 



t Bisepalac (nempe sepalis lateralibus fere ad apicem 



gionbus 



connatis) ; labello indiv 



Matthewm {Lindl. in Comp. Bot. Mag 



lanqift 



aymb. t. 57.); folio oblongo acuminata basi rotundato racemis 



petalisq 



carnoso 



membranaceo. Peru. 8 



2. Y.Uestrepioides ; folio oblongo coriaceo subsessili spicis subgeminis strictis 

 duplo breviore, flonbus rineentiliiiA <Ka m .i; a ^i£-Z L-JP „j i«f;« 



disepali 

 ymbiformi 



• 



