Cogniaux Dict. Icon. des Orch. Oncidium (1899) t. 21. 
Oncidium Pavoni Reichenbach filius ex Lindley Fol. 
Orch. Oncidium (1855) 5, sub no. 7, nomen nudum; 
Kriinzlin in Engler Pflanzenr. LV. 50, pt. 2 (Heft 80) 
(1922) 38. 
Oneidium ionodon Reichenbach filius in Linnaea 41 
(1876) 23. 
Oncidium Davisn Reichenbach filius in Linnaea 41 
(1876) 24. 
Cyrtochilum faleipetalum Krinzlin in Engler Pflanzenr. 
IV. 50, pt. 2 (Heft 80) (1922) 87, fig. 1 G, a-e. 
Cyrtochilum Pavoni Krinzlin in Engler Pflanzenr. 
IV. 50, pt. 2 (Heft 80) (1922) 388. 
Oneidium Pavoni, although lacking any original diag- 
nosis, has been considered by the several writers men- 
tioning the name as a form of O. falcipetalum. 
Judging from the description (limited to the flower), 
the Peruvian Oncidium ionodon differs from O. falcipet- 
alum only in having an emarginate dorsal sepal, clawed 
petals and porrect violet lateral lobes of the lip. How- 
ever, the plate of O. falcipetalum illustrated in Cogniaux’ 
work (I.c.) shows a crisped dorsal sepal, which might well 
be taken for emarginate, and petals that appear to be 
more or less clawed. Also, in specimens reasonably re- 
ferred to O. falcipetalum, the petals (when examined 
closely) are very shortly clawed. In general, too, the 
color of the flower attributed to O. tonodon coincides 
with that shown in the plate indicated. 
Onecidium Davis, of which there is in the Ames Her- 
barium a tracing of the floral analysis from the Reichen- 
bach Herbarium, is almost an exact counterpart of O. 
ionodon, except that the dorsal sepal is noted as acute, 
the petals as very shortly clawed, and the lateral lobes 
of the lip deflexed. 
It is a strange coincidence that both O. ionodon and 
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