42 



I take this opportunity of stating, that the genus Acan- 

 thophippium does not belong to Vandece, as I formerly sup- 

 posed, from the examination of an imperfect specimen, but 

 in reality should be stationed in JEpidendrece, where it repre- 

 sents the Maxillaria of Vandese, and the Dendrobium of 

 Malaxideaa ; an interesting fact with reference to systema- 

 tical purposes. It should be placed near Bletia and Phaius. 



69. STELIS tristyla. 



S. tristyla ; folio oblongo concavo subundulato spica breviore, spica erccta laxa 

 subtortili, bracteis membranaceis cucullatis cuspidatis, calyce triangulari, 

 petalis truncatis carnosis, labello truncato medio sulcato, columna depressa 

 angulis tortis incurvis facie superiore viscida stigmatica. 



A species imported from Brazil by Messrs. Loddiges, and, 

 like the rest of the genus, not at all remarkable for beauty, 

 although one of the largest that we yet have seen. It 

 flowered in April. 



70. PLEUROTHALLIS marginata. 



P. marginata ; folio obovato biconvexo marginulato caule pluries longiore 

 racemo laxo erecto multo breviore apice obsoletissime tridentato, sepalis 

 subfalcatis carinatis lateralibus semiconnatis, petalis linearibus obtusis apice 

 callosis, labello lineari obtuso canaliculato. 



A very small species with the habit of P. Grobyi, and of 

 no beauty. It was sent to Mr. Bateman from Guatemala, 

 by Mr. Skinner, and grows in dense tufts on the branches 

 of trees. 



71. PLEUROTHALLIS aphthosa. 



P. aphthosa ; folio ovali coriaceo subtus discolore cauli carinato triquetro sequali, 

 spatha bivalvi pauciflora, floribus subsessilibus tomentosis carnosis fragilibus, 

 sepalis oblongis convexis subeequalibus intus papillosis lateralibus basi con- 

 natis, petalis ovatis acutis glabris subdiaphanis, labello ovato carnoso obtuso 

 antice papilloso basi excavato glabro, columna petalorum longitudine, cli- 

 nandrio cucullato crenulato. 



A Mexican species of this extensive genus, for which I 

 am obliged to Mr. Bateman, who received it from the Bir- 

 mingham Botanic Garden, without a name. Its leaves are 

 between three and four inches long, dull purple at the edge, 

 and brighter underneath ; the flowers are dull yellow, 



