plates that have been prepared by Mr. Bauer for the next Part of the 

 Illustrations of Orchideous Plants. 



The genus Angrsecum was first established by Du Petit Thouars 

 in 1822. It consists, as far as is at present known, exclusively of 

 plants native of trees in the islands of Bourbon, Mauritius, and Mada- 

 gascar, and of the south-eastern part of the continent of Africa. 

 Strictly limited, that is to say excluding certain species admitted 

 by its founder, it is known by its undivided lip, which is neither cucul- 

 late, nor articulated with the column; by its spreading perianthium, 

 which never has the segments turned upwards as in Eulophia ; by its 

 long taper-pointed spur, which is rarely enlarged at the base ; and 

 finally, by all these characters being connected with coriaceous leaves, 

 that are never ribbed or plaited. Such being the definition of An- 

 grsecum, it will be apparent that, independently of the species already 

 separated under the names of Aeranthes, CEonia, &c, certain others, 

 such as our Angrsecum maculatum, and a few of those of Du Petit 

 Thouars, must be excluded ; these form a genus nearly related to 

 Eulophia, from which they are to be distinguished by their coriaceous 

 leaves, by the perianthium never being secund, and by the want of 

 a crest upon the lip. They may be thus defined : 



(ECEOCLADES. 



Perianthium patens, v. ringens, v. connivens, subsequale, liberum, non 

 secundum. Labellum liberum, sessile, cum columna articulatum, calca- 

 ratum ; calcare curvo seepe obconico, lamina lobata cucullata, v. complicate, 

 v. concava. Columna ssepe elongata, semiteres. Anthera 2-locularis. Pol- 



linia 2, postice sulcata, caudicula angusta, glandula minuta. Epiphytse, 



acaules v. caulescentes, nunc pseudobolbosse. Folia coriacea, aut raro mem- 

 branacea, nunquam plicata. Flores ssepius minuti. 



Sp. Angrsecum maculatum Lindl. — parviflorum, caulescens, carpopho- 

 rum, gracile, Thouars — Limodorum pusillum, filiforme ? funale, falcatum, 

 W. et plures Indicse ineditse. 



Among the collections of Dr. Wallich are the following new 

 genera, belonging to the same tribe as Angrsecum and CEceoclades, 

 with which our Botanical readers will be glad to be acquainted. 



DlPLOCENTRUM. 



Perianthium subclausum, liberum. Sepalum supremum lateralibus paullo 

 obliquis multo minus. Petala sepalo supremo paululum majora. Labellum 

 cum columna articulatum, indivisum,bicalcaratum. Columna minuta, semi- 

 teres, rostello obtuso. Pollinia 2 ? caudicula subulata, glandula maxima 



concava. Epiphyta, caulescens. Folia eomplicata, carnosa, recurva. 



Racemi paniculati, recurvi. Flores minuti. Calcaria brevia, obconica, 

 incurva. 



Sp. 1. Diplocentrum recurvum. 



Micropera. 

 Perianthium sequale, patens, sepalis lateralibus basi labelli adnatis. La- 

 bellum cum basi columnae continuum, calceiforme, leviter trilobum, lobo 



