Tab. 5632. 



ONCIDIUM SERRATUM. 



Serrated On cidiu m . 



Nat. Ord. Oechide^;. — Gynandeia Monandeia. 

 Qen. Char. {Vide supra, Tab. 4148.) 



Oncididm serratum ; pseudobulbis ovalibus elatis dipbyllis, foliis erectis 

 rigidis acutis basi angustatis canaliculars, panicula pauciflora brevio- 

 ribus, sepalis serrato-crispatis, dorsali reniformi, lateralibus multo 

 longioribus obovatis patentissimis, petalis ovatis acutis serrato-crispatis 

 conniventibus, labello multo minore bastato, laciniis acutis intermedia 

 lineari obtusa medio constricta lateralibus acuminatis triplo minoribus 

 (crista depress^, crenulata), columnar alis subulatis ascendentibus. 



Oncidittm serratum. Lindl. Sert., Rchb. in Walpers Ann. vi. 



Oncidium diadema. Hort. 



1 was much struck with this very remarkable Oncidium, 

 which I had the good fortune to see in flower in the Bishop 

 of Winchester's collection at Farnham Castle, in December 

 last. It has the colour and somewhat the appearance of 0. 

 crispum, but the flowers are tossed about after a strange and 

 fantastic fashion, which will no doubt become still more pro- 

 noncee as the plant gathers its full strength and sends forth 

 twining scapes nine or ten feet long. It belongs to a pecu- 

 liar group, that was at one time regarded as a distinct genus, 

 i. e. Cyrtochilum, but which is now more properly considered 

 a subgenus of Oncidium. Some of them — the Cyrtochilum 

 vohbile of Poeppig, for example — have stems twenty feet 

 high. Mr. Linden was the introducer of the present plant, 

 which he sold under the unwarranted name of 0. diadema 

 in Stevens's rooms. It is a native of Peru, and must be re- 

 garded as a moderately " cool " orchid. 



Descr. Pseudohdbs tall and oval, bearing one or two 

 long, rigid, erect, acute leaves, which are narrowed at the 

 base and canaliculate. Panicle lax. many-flowered, much 



MAECH 1st. 1867. 



