Tas. 5756. 
ONCIDIUM xantnopon. 
Golden-toothed Oncidium. 
Nat. Ord. Orncnu1pr“#.—GynNanpRIA MoNnaANpDRIA. 
Gen. Char. (Vide supra, Tas. 4148.) 
Oncrpium (Cyrtochilum) wanthodon; pseudobulbo elongato ovoideo com- 
presso levi, folio anguste obovato-oblongo coriaceo, scapo volubili 
longissimo, panicula ampla ramosa flexuosa multiflora, bracteis ovato- 
lanceolatis spathaceis ovario elongato multo brevioribus, perianthii 
lobis undulato-crispatis brunneis aureo-marginatis et crenulatis, se- 
palis petalisque unguiculatis obovato-rotundatis his paulo minoribus, 
labello parvo sessili basi subhastata fornicata, callis tuberculiformibus, 
lamina anguste obovata unguiculata recurva, columna breyi sigmoidea, 
alis minutis. 
Onciprum (§ Cyrtochilum) xanthodon. H. G. Reichenbach ful. in Gard. 
Chron. 1868, p. 1338. 
A very remarkable species, described by Dr. Reichenbach 
as being allied to O. serratum, conspicuous for its large 
panicle and numerous flowers, and the chocolate-brown colour 
of the reflexed and wavy perianth-segments, which are edged 
with a golden band, crenate and almost crisped ; it was im- 
ported by Messrs. Backhouse, of York, from the eastern parts 
of the Cordillera of Ecuador. Four plants of it flowered 
simultaneously in November of last year with Messrs. Back- 
house, who inform me that the flowering stems were six to 
eight feet long and twined round every available object with 
which they came in contact. 
Descr. Pseudobulb five inches long, narrow-ovoid, much 
compressed, perfectly smooth, bright green, with a few 
sheathing leaves at its base and one at its apex. Leaves one 
anda half to two feet long, two to two and a half inches 
broad above the middle, narrow linear-obovate, acute, bright 
green, quite smooth. Scape very slender, six to eight feet 
‘long, much branched, twining, greenish-brown ; sheaths ap- 
FEBRUARY Ist, 1869. 
