10 ONCIDIUM. 



A very distinct species, first detected by Matthews on tlie liigH 

 mountains near Andimarca in Peru, in 1838, and afterwards by 

 Warscewicz near the sources of the Amazon. Both Lindley and 

 Eeichenbach have noted that in the specimens gathered by these 

 collectors the labellum and its crest were somewhat different; in 

 Matthews' type ''the lip is as broad as long," in Warscewicz's "longer 

 than broad/' It is evidently the latter form that is now cultivated. 

 We are indebted to Baron Schroeder, of The Dell, for materials for 

 description. 



On. auriferum. 



Pseudo-bulbs ovoid, much compressed with acute edges, 2 — 2^ inches long, 



monophyllous. Leaves linear, sub-acute, 7 — 10 inches long. Peduncles 



longer than the leaves, glaucescent, loosely panicled, the branches short 



and few flowered. Flowers an inch across vertically ; sepals and petals 



citron-yellow with 2 — 3 transverse pale brown bars, the dorsal sepal 



elliptic-oblong ; the lateral sepals and " petals longer and narrower, the 



former free ; lip citron-yellow with a pale red blotch next the crest, 



three-lobed, the basal lobes small, oblong with revolute margin, 



the front lobe transversely oblong, deeply twolobed Avith crenulate 



margin ; crest a thickened triangular white ridge with tAvo small teeth 



in front and three minute ones on each side. Column Avitli a narroAV 



wedge-shaped Aving on each side of the stigma. 



Oncidium auriferum, Rchb. in Linn.iea, XXII. p. 847 (1848). Lindl. Fol. Orch. 

 Oncid. No. 181 (1855). 



Discovered by the Belgian collectors Funck and Schlim in 1846 — 7 



on the mountains of Merida in Venezuela at 5,000 — 7,000 feet 



elevation, and occasionally imported since with other orchids from 



the same locality. It is very near Oncidium 'panchrysxim, from which 



it may be distinguished by its more slender inflorescence Avith smaller 



flowers that are not self coloured. Materials for description were 



sent to us from the Royal Gardens at Kew, and by Mr. T. B. 



Haywood, of Woodhatch, Reigate. 



On. barbatum. 



Pseudo-bulbs oval-oblong, 2 — 2| inches long, compressed, monophyllous. 

 Leaves luiear or oval-oblong, 3 — 4 inches long, acute or emarginate. 

 Peduncles slender, pale green spotted Avith red-broAvn, loosely paniculate 

 and fcAv floAvered at the extremity. FloAvers about an inch in diameter; 

 sepals clawed, oval-oblong, undulate, yelloAV blotched Avith chestnut-broAvn, 

 the lateral tAvo narroAver, connate to one-third of their length; petals 



