on the lip and the degree of lobing of the column-wings. 
It appears to be frequent in Costa Rica and occurs in the 
Province of Chiriqui, Panama. 
Oncidium obryzatoides Avrdnzlin in Engler Pflan- 
zenreich LV. 50, pt. 2 (Heft 80) (March 1922) 240. 
Oncidium fulgens Schlechter in Fedde Repert. Bei- 
hefte 17 (December 1922) 83. 
Oncidium varians Schlechter in Fedde Repert. Bei- 
hefte 19 (1928) 151. 
Oncidium Brenesu Schlechter in Fedde Repert. Bei- 
hefte 19 (1928) 257. 
A photograph of the type of Oncidium obryzatoides 
in the Ames Herbarium shows that this species differs 
from the description in having flattened-ovoid rather 
than oblong pseudobulbs and in having the lateral lobes 
of the lip triangular-ovate or semioblong and auriculate 
instead of linear and retuse. 
A drawing of Oneidium fulgens made under the su- 
pervision of Dr. Schlechter together with specimens said 
to represent the type collection indicate that this concept 
is scarcely separable from O.obryzatoides. From the lat- 
ter species, O. fulgens appears to vary in having some- 
what narrower leaves, less prominently produced lateral 
lobes of the lip, more sharply lobulate callus on the lip 
and column-wings which are obtuse at the base. How- 
ever, these tendencies are present in otherwise typical 
forms of O.obryzatoides. 
Oncidium varians, of which there is an example of the 
type number in the Ames Herbarium, differs from typ- 
ical O.obryzatoides in having more elongated pseudo- 
bulbs and leaves. The callus on the lip appears to be very 
similar to that of O. fulgens, and the base of the column- 
wings is either acute or obtuse. 
Oncidium Brenesu, judging trom analyses made from 
[6 ] 
