8 (1889) t. 368, non O. undulatum (HBK.) Lindl. 
(1842). 
Cyrtochilum aemulum Wrinzlin in Notizbl. Bot. Gart. 
Berlin 7 (1917) 98, nomen nudum, in clavi; in Engler 
Pflanzenr. IV. 50, pt. 2 (Heft 80) (1922) 47, fig. 3 C, 
a—e. 
Cyrtochilum superbiens Krinzlin in Notizbl. Bot. Gart. 
Berlin 7 (1917) 93, nomen nudum, in clavi; in Engler 
Pflanzenr. IV. 50, pt. 2 (Heft 80) (1922) 49, fig. 3 E, 
oe 
After a careful comparison between Oncidium super- 
hiens (represented by a photograph of the type and the 
type description) and O. aemulum (represented by a 
photograph of Lindley’s concept, supplemented by the 
type description), I am unable to separate the two species. 
All the specimens of O. superbiens noted appear to 
have the petals yellowish or whitish, more or less barred 
below with brown or purplish brown, whereas there is 
no record of such coloring in O. aemulum. 
The figures of these concepts in the Pflanzenreich 
(under Cyrtochilum) confirm my conclusions that they 
are conspecific. 
Oncidium ventilabrum Reichenbach filius & War- 
scewicz in Bonpl. 2 (1854) 101; Lindley Fol. Orch. On- 
cidium (1855) 6, no. 12. 
Cyrtochilum undulatum Humboldt, Bonpland & Kunth 
Nov. Gen. et Sp. Pl. 1 (1816) 849, t. 84; Krinzlin in 
Engler Pflanzenr. IV. 50, pt. 2 (Heft 80) (1922) 57. 
Oncidium undulatum Lindley Sert. Orch. (1842) sub 
t. 48, no. 1; Reichenbach filius & Woarscewiez in 
Bonpl. 2 (1854) 108; Lindley Fol. Orch. Oncidium 
(1855) 7, no. 15, nee Oncidium undulatum Sims (1804) 
nec O. undulatum Salisb. (1812). 
Cyrtochilum ventilabrum Kriinzlin in Notizbl. Bot. 
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