Oncidium cebolleta

Hermosa orquidea por favor agregala ala mission Orchids of the World http://www.projectnoah.org/missions/9525140

Wow! So cool to see wild shots of these. cormoros is right, this is an Oncidium. It's a very unusual one because it has terete (more or less cylindrical) leaves. There is a small section of the genus called Cebolletae, in which all the species have terete leaves. The most widespread is Oncidium cebolleta & I suspect that's what you've spotted here. http://homepages.ihug.co.nz/~tomnz/oncframe/onc_cebolletaee.htm It is supposed to be very variable flower wise. There is another species listed as found in Mexico, Oncidium ascendens & in the link above, the flower of O.stipitatum looks very similar to your spotting but this species is listed as native of Honduras, Nicaragua, and Panama, not Mexico. It's never out of the question that this could be a new record for that species but most likely it is a form of O.cebolleta.