1875 



* BIFRENARIA auiantiaca. 

 Orange-coloured Bifrenaria. 



GYNANDRIA MONANDRIA. 



Nat. ord. Orchidace^, § Vande^. 



BIFRENARIA, Lindl. Sepala patula, libera, subaqualia ; lateralia 

 cum basi producta columnae connata vix basi obliqua, Petala scpalis duplo 

 minora. Labellum cum pede mucronato columnse articulatum, cucuUatum, tri- 

 lobum, medio callosum. Columna brevis, semiteres, mutica. Anthera mutica, 

 subcristata. Pollinia 4, per paria incumbentia, caudiculis duabus distinctis 



materiel viscidae rostelli adhaerentibus, glandula (oblonga). Epiphytapsewrfo- 



bulbosa, Maxillarice (Colacis} habitu. Ge?i. et Sp. Orch. 152. 



B. aurantiaca ; pseudobulbis subrotundis compressls dlphyllis, foliis oblongis 

 plicatis racemi erecti longitudine, petalis erectis, labelli lobis lateralibus semi- 

 cordatis intermedio transverso ovali subundulato basi bicalloso, columna 

 pubescente. 



Perianthium bilahiatum. Petala obovata, rotundata, crenata, erecta, 

 cum sepalo supremo oblongo acuto labium supremum formantia. Sepala 

 lateralia ovata, obtusa, supra pubescentia, patentia, basi obliqica, supremo 

 duplo latiora, Labellum cum columricB pede producto articulatum, tmguicu- 

 latu7n ; unguis cuneatus, carnosissimus, limbi longitudine, callo transverso 

 truncato ad apiceni ubi in limbum abit ; limbus tripartitus lacinid intermedia 

 transversd apiculatd indivisd subundulatd, lateralibus erectis semicordatis, 

 obtusis utrdque Jiexurd elevatd baseos callum mentiente. Columna semiteres, 

 pubescens, clinandrii dorso acuminato. i^nthera triangularis : angulis pilosis, 

 lateralibus productioribus. Pollinia 2, biloba, caudiculis totidem glandulae 

 communi adhaerentibus. 



A pretty epiphyte, native of Demerara. For the oppor- 

 tunity of publishing it I am indebted to his Grace the Duke 

 of Devonshire, in whose hot-house at Chiswick it flowered 

 in October, 1835. 



* So named in allusion to the double strap or frsenum that connects the 

 pollen masses with their gland. 



