384 Professor Lindley on New Orchidaceae. 



differs in its fringed petals, and in the dilated rounded mem- 

 branous apex of its fleshy lip. 



Orxithocephalus inflexus; sepalis acutissimis erectis ca- 

 rinatis, petalis rotundatis serrulatis, labello oblongo acuto 

 concavo apice inflexo : margine baseos utrinque calloso. — 

 Mexico, Hartweg. 



Catasetum lammatum\ labello saccato apiculato basi fim- 

 briato : axi lamella unica alta basi biloba instructo, co- 

 lumna cirrhata. — Mexico, Hartweg. 

 A very fine species, remarkable for a deep plate running 



along the labellum, from base to apex. 



DiCH^A squarrosa ; foliis linearibus squarroso-recurvis, flo- 

 ribus subterminalibus, labello cymbiformi sessili apiculato 

 columna glabra antice unidentata. — Mexico, Hartweg. 

 Flowers large for the genus, apparently white. 



Arpophyllum spicatum (Llave) ; folio carinato arcuato, pe- 

 dunculo spatha breviore. — Mexico, Hartweg. 

 Flowers deep purple, arranged in a spike about 3 inches 

 long. 



Arpophyllum giganteum (Hartweg in litt.) ; folio ensiformi 

 piano, pedunculo spatha multo longiore. — Mexico, Hart- 

 weg. 

 This fine plant must be at least 3 feet high ; its flowers are 



pale lilac, and disposed in a spike from 6 to 7 inches long. 



Cyrtochilum graminifoliurri', foliis Hneari-ensiformibus acu- 

 tissimis erectis racemo subpaniculato brevioribus, labello 

 obovato integerrimo basi 5-lamellato, columnae alis parvis 

 rotundatis. — Mexico, Hartweg. 

 This species is much like C. maculatum, but differs in the 



form of its lip, its very narrow leaves, and smaller flowers. 



Spiranthes ramentacea', aphylla? vaginis caulis laxis mem- 

 branaceis acuminatis, labelli limbo concavo ovato inte- 

 gerrimo obtuso, ungue et columna in medio pubescenti- 

 bus. — Mexico ; Prope Santa Barbara, regione calida, 

 Aprili, Hartweg. 

 This very curious species has altogether the appearance of 



Altensteinia or of Apaturia, 



