distantibiis, petalis sepalisque quorum laleralia semicoiuiata acutis reflexis, labelU) 

 maximo subrotundo obsolete quadrilobo : lobis lateralibus rotundati?, crista postice 

 tridentatil fornicata antic^ cuneata varicibns vcnarum in posticis confluentibus cir- 

 cumdatik, alis siiperioribus coluinnse rotundatis doiiticuUitis interioribus integcrrimis. 



Brazil, Prinoe Maximilian of Wied Neuwied. A very fine species in the way 



of O. bifolium, but with large spreading compound racemes. 

 ^. O. -hopterum; pseudobulbis ovalibus compressis diphyllis, foliis angustis canaliculatis 

 recurvis scapo apice paniculate flexuoso quadruplo brevioribns, sepalis acutis supremo 

 fornicato lateralibus seniiconnatis divaricatis, petalis obovatis reflexis, labelli laciniis 

 lateralibus brevibus angustis obtusis intermedia transversa augulata biloba, crista 



tuberculosa, columnre alis 4 subsequalibus rotundatis. Brazil, Von Martius. ■ X 



small species very near O. flexuosum. 



A. U. ft. * 



4. O. Martianum ; pseudobulbis, .... foliis . . . . , scapo erecto paniculato, sepalo supremo 



petalisque obovatis obtusis concavis lateralibus liuearibus acutis brevioribns, labello 

 bilobo reniformi : laciuiis lateralibus rotundatis nauis, crista falcata compressil utrin- 

 que tuberculis 3 liuearibus f suffulta, alis columiiaj denticulatis subquadratis angulis 



rotundatis. In Brazil, von Martius. A beautiful yellow species, with a scape 



two feet high; it resembles in general appearance O. ampliatum. 



5. O. Itmatum; pseudobulbis oblongis compressis 1-2- phyllis, foliis anguste oblongis planis 



obtusis scapo brevioribns, scapo racemoso, sepalis petalisque spathnlatis retusis, labello 

 pnbescente lunato basi piloso : laciniis lateralibus minimis inflexis, crista lineari apice 

 depressa utrinqne bidentata : dentibus glanduligeris, alis colnmna; cuneatis integris, 



clinandriopostice dentato. ."i. pretty little species, with a w'liite crescent-shaped lip, 



blotched with dull orange, and white sepals blotched with deep orange. Messrs. 



Loddiges imported this plant from Demerara. It will be figured in the Botanical 

 Register, folio 1929. 



6. O. retusum ; pseudobulbis foliis lineari-lanceolatis, scapo paniculate divaricato, 



sepalis petalisque subiequalibus spathulatis retusis subcarnosis, labelli lobo medio 

 reniformi bilobo lateralibus paulu mnjore, crista e lamellis 5 brevibus tuberculos 



6 elongatos circumdantibus, columnije alis maximis acinaciformibus dentatis. 



Peru, Mathews in herb. Hooker. A beautiful species with deep chesnut and yel- 

 low flowers, and a yellow lip. Its mode of growth is that of O. Baueri. 



7. O- gmcile ; pseudobnlbis ovatis compressis diphyllis, foliis laneeolatis acutis brevibus, 



scapo gracili apice racemoso 3-6-tloro, sepalis lineari-lanceolatis, petalis paulo latio- 

 ribus, labello cuneato cmarginato basi auriculato lamellis diialuis linearibus cristato, 



columnoe alis oblongis integris. Brazil, von Martius. Tlie scape of this s))ecies 



is about a foot high, with from 3 to 6 rather small flowers at the end. The leaves 

 are not more tlian two inches long, and the pseudobulbs about ^rd that length. The 

 lip is yellow, the remainder of the flower reddish brown and green. 



8. O. ramosum ; pseudobulbis ...., foliis , panicula stricta densa ramossl, sepalis 



angustis acutis supremo erecto fornicato lateralibus unguiculatis angustioribus, pe- 

 talis oblongis subundulatis, labello subrotundo bilobo basi auriculato, crista digitato- 



tuberculata squamis ^ carnosis inteijectis, columnar alis rotimdis integerrimis. 



Brazil, von Martius. Scape a foot and half long, much branched, very compact, 



not at all floxuose. Flowers extremely numerous, yellow and olive, rather smaller 

 , than those of O, altissimum. A beau1:iful species. 



/ 9. O. leucochilum (Bateman in litt.); foUis .... pseudobulbis ...., scapo elato panicu- 

 lato, sepalis petalisque oblongis obtusis subsqualibus patentissimis, labello reniformi 

 alte bilobo utrinque emarginato : laciniis lateralibus retusis nanis, crista 3-corni basi 



utrinqne dentatii, columnse alis acinaciformibus dentatis. Mexico, Mr. Bateman. 



A noble species with the habit and stature of Oncidium Baueri. Flowers greenish, 



banded with crimson ; lip pure white. 



10. O. rpfiexum; pseudobulbis ovatis monophyllis, foliis anguste laneeolatis acutis, racemis 

 subcompositis longissimis pendnlis multifloris, sepalis petalisque lineari-lanceolatis 

 undulatis acutis reflexis, labello reniformi emarginato : laciniis lateralibus rotundatis 

 dilatatis planis, cristi depressa tridentata apice bicorni, columnre alis falcatis den- 

 tatis. Mexico, Count Kai-winski. A beautiful species related to O. altissimum ; 



there are specimens in the Royal Bavarian IMusenm, now in my care, and the species 

 is cultivated by Messrs. Loddiges. I mistook a specimen of this plant, preserved in 

 Mr. Lambert's Herbarium, for O. funereum of La Llave, but that species, having 

 lenticular depressed pseudobulbs, must be dift'erent. 



A.^l.ft. •* 



11. O. raniferum ; pseudobulbis ovatis sulcatis diphyllis, foliis lato-linearibus acutis 

 scapo paniculato brevioribns, sepalis petalisque oblongis acutis patulis, labelli laciniis 

 lateralibus triangularibus intermedia cuneata emarginata, crista depressa medio con- 

 stricta: dimidiS posteriore quadrata basi utrinque callosa medio tuberculatil ante- 



riore triangular! apice emarginata utrinque foveata, alis columnre integris. Brazil. 



-A small yellow-flowered species, with the lower half of the lip chesnut coloured; 



it exists in Mr. Knight's collection. 



A. (j l.ft. ••• 



12. O. deltokienvi ; pseudobulbis angustis angnlatis, foliis laneeolatis canaliculatis, scapo 

 paniculato ramis multifloris flexuosis divaricato, sepalo supremo unguiculato obovato 

 lateralibus longioribus spathulato-lanceolatis, petalis latiorihus obovatis crispis, labello 

 deltoideo angulis rotundatis, crista basi tubereulata apice trilamellata, colunmse alis 



maximis acinaciformibus dentatis. Peru, Mathews. A remarkable species, with 



Eoniewhat the habit of a dense-flowered O. altissimum. 



*.. 



