1522 



ANGR.ECUM* eburneum. 

 Ivory Angr cecum. 



GYNANDRIA MONANDRIA. 



Nat. or d. Orchideje. ^ Vancleae Lindl. (Introduction to the natural 

 system of Botany, p. 262.) 



ANGR2ECUM Thouars. — Perianthium patens. Sepala et petala sub- 

 tequalia, libera. Labellum sessile, cum basi columnse continuum, carnosum, 

 indivisum, petalis multo latius ; calcare recto cornuto, ssepius subcylindraceo, 

 perianthio multo longiore, raro obconico. Columna nana, subteres, rar6 

 elongata, semiteres. Anthera 2-locularis, truncata. Pollinia 2,bipartibilia, 



caudicula brevi angusta, glandula triangulari. Epiphytse, caulescentes. 



Folia coriacea, ligulata, apice obliqua. Flores solitarii v. racemosi, albi, 

 nunc citrini, v. herbacei. 



A. eburneum ; caule simplici, foliis coriaceis lucidis apice obliquis 7-striatis, 



spicis multifloris secundis, labello cordato subrotundo cuspidato basi jugo 



elevato cristato, calcare sepalo supremo parallelo et dimidio longiore, 



ovario scabro. 



Limodorum eburneum. " Borv Voyage, 1. 359. t. 19." Willd. sp. pi. 



4. 125. 

 Angrsecum eburneum. Thouars orch. afr. t. 65. Ach. Richard orch. 



maurit. p. 71. 

 Aerobion eburneum. Spreng. syst. veg. v. 3. 



Caulis erectus, simplex, crassus, sesquipedalis, hie illic radices tortuosas 

 promens. Folia subdisticha, ligulata, lucida, valde coriacea, apice obliqua, 

 quandoque emarginata. Spica e basi caulis, ascendens, caidis longitudine, 

 teres, secunda, multiflora. Flores inodori, explanati, diametro 3^-imciali. 

 Sepala et petala subcequalia, lineari-lanceolata, coriacea, basi convexa, omninb 

 libera, pallide herbacea. Labellum eburneum, cordatum, subrotundum , 

 abruptc acuminatum, concavum, basi crista 1 obcuneatd elevatd longitudinali 

 instructum, calcaratum. Calcar fere tres uncias longum, cornutum, ad 

 apicem sensim attenuatum, intus pubescens, cum sepalo dorsali parallelum. 

 Columna nana, carnosa, subteres, truncato-conica. Clinandrium planum, 

 immarginatum, apice angustatum ; margine antico altt excavato. Stigma 

 sub fornice clinandrii occultum. Anthera subrotunda, truncata, bilocularis ; 

 loculis paulb disjunctis, longitndinaliter dehiscentibus. Pollinia 2, bipartita, 

 incumbentia, basi approximata, caudicula lineari emarginatd glandulce 

 triangulari affixd. Ovarium breve, sexsulcatum, verruculosum, costis ro- 

 tundatis. 



* An alteration of Angurek, the Malayan name of such plants. 

 VOL. XVIII. H 



