× Brassidium, abbreviated in trade journals Brsdm, is an artificial intergeneric hybrid between the orchid genera Brassia and Oncidium (Brs x Onc).

[1][2] When Cochlioda and Odontoglossum are sunk into Oncidium, × Maclellanara (Mclna.

The nothogenus name × Brassidium was first published in 1948 in the Orchid Review, for hybrids between Brassia and Oncidium.

It was named Brassidium Coronet,[3] and was registered by O.

[4] As of December 2023[update], Plants of the World Online sank Cochlioda and Odontoglossum within Oncidium.