[1][2][3][4] They are plants of ovoid pseudobulbs spaced in long, along a creeping or ascending upward rhizomes, with thick and tanned leathery leaves.

The petals and sepals have similar shapes and sizes, with very frizzy, oval, large margins, somewhat concave.

In 2001 Mark W. Chase and Norris Williams subordinated the Oncidium section Serpentia to Otoglossum.

Otoglossum, according to its new definition already expanded to include the aforementioned section of Oncidium, then groups about thirteen epiphytic species, occasionally terrestrial, in rule of scandal growth, that inhabit humid, fresh and cold mountainous areas from Costa Rica to Peru until the altitude of three thousand meters, over trees or rocky escarpments.

Three species registered for Brazil, two belonging to the old section of Odontoglossum and one to Oncidium.