ONCIDIUM. 



ORCHIDES. 725 



49. ONCIDIUM MACROPETALUM Lindl. Sert. Orcli. siib t. 48. L. F. p. 16: 



(A.) Sepals and peials banded willi brown ; laleral lobes of iip very shorl and 

 rounded; islhmus serraied. 



(B.) chrysopterum. Sepals and pelals much srnaller . wliole-coloured; lateral 

 lobes of iip linear, obtuse, acinaciform ; isthmus enlire. 



The general appearance of.A is ihat of a thin, straggling specimen of 0. flexuosum , 

 ihe petals are nearly as large as ihe lip ; the crest consists of three linear lobes, 

 in front, then of a clnster of smaller papillne, aiid at ihe base of a middle ridge. 

 wiih a broad plaie on each side. B. is probabiy a distinct species; bui I dare noi 

 establish it on ihe materials before me , consisting of a sketch and a bad dried spe- 

 cimen, wiih two half-decayed flowers. It is a smaller plant. ihe little panicle nol 

 bearing more than four or flve flowers; the cresl is unascertainable , but seems lo 

 consist inter alia of a pair of horn-like spreading tubercles. I am not even sure 

 that the specimen from Bolivia and ihe sketch from Matto Grosso really belong to ihe 

 same species ; it is to the laiter that ihe name is niore particularly intended lo attach. 

 Wild. A. in Brazil-Gardner, 4359. B. Mailo Grosso-c. Weddell. Nr. 40; Bo- 

 • ivia, in the province of Chiquito's— hb. Weddell, 3476. 

 Huc : Oncidium macropelalum Lindl. I. c. : 



Fseudobulbis ovatis compressis , foliis ligulalis acutis canaliculatis 

 falcalis , panicula laxa erecla multiflora brevioribus, sepalis lineari-lan- 

 ceolalis acuminatis, lateralibus semiconnatis, petalis obovalis rolundatis, 

 Inbello fere aequalibus, labelli trilobi lacinia intermedia lunatai, lalera- 

 libus rolundatis paulo brevioribus sinu serrato, crista basi trilamellata 

 apice Iriloba tuberculis quibusdam interjectis , columnae alis linearibus 

 obtusis. Brazil. 



This is Mr. Gardners Nr. 4359. a spec. with much the habil of 0. flexuosum. Lip 

 and petals appear to be pure ycllow, sepals spotted wiih browu. 



§ 5. Tetrapetala macropetala. 

 Analysis of thc species. 



Scapi foliis aequales 



Lab. unguic. crista serie longa duplici Mmbriala 50. ^Vidgreni. 



,, „ crista bicorni 51. cuveatum. 



Scapi foliis multo longiores 

 Labellum iniegrum. 



lamcllis 4 acutis. Volubile o'Z. acinaceum. 



crista iransversa 1 53. candidum. 



Labellum irilobum. 

 lac. lat. linearibus elongalis. 



sep. lat. acutissimis 54. fimbrialum. 



„ „ unguic. obtusis 55. cvrnigernm. 



lac. lat. auriculaeformibus. 



Bracteae maximae spatbaceao 56. Warczewiczii. 



„ ininutae. 



Lab. auriculae obsoletae 57. Gardneri. 



,, ,, manifestae. 



crista inappendiculata divergeiiti-biloba (bicruris). 

 tliiiandr. crispo-marginaluni. 

 pelala rciusa. Alac c apicalcs o^i. amictum. 



