Aspasia species have few medium size flowers of exquisite colors which are occasionally cultivated or used to produce artificial hybrids.

Some species are exclusively epiphytic on thick stems of the trees a low height, others live on branches where they get more light and a few occasionally appear as lithophytes.

[3] Aspasia lunata is primarily epiphyte on thick stems but often is found living over rock grooves covered by fallen leaves and humid forests where they never are exposed to straight sunlight.

Aspasia variegata is found in open forests both in dry and flooded lands, then often on branches of the trees hanging over the waters.

[4] Aspasia is a genus of comparatively robust plants intermediate of Brassia and Miltonia, to which it is morphologically closer although can be distinguished because its flowers show the labellum partially fused to the column up to the middle then abruptly folded down in a square angle.

These are articulated, basally conduplicate, ligulate sometimes with acute apex, thin and narrow, very malleable, light green colored.

The petals from more elliptical to more acute, in some species wider than the sepals, in others narrower or similar in size and shape, from flat to concave.

The labellum is fused to the inferior half of the column, seeming to emerge from there and thereafter becoming much wider; the blade varies from slightly to clearly three lobed, flat or reflected, fleshier on the center where they have calli or salient veins.

The column is elongated, with or without small inferior auricles and presents a large apical anther with two hard yellow pollinia, stipe and viscidium.

[3] When Aspasia species are used to produce artificial hybrids, the characteristic that seems to predominate is the low number of resulting flowers by inflorescence, prevailing even over the so floriferous Oncidium.

Despite being easy to grow Aspasia species tent to be subject to spots on their thin leaves generally caused by fungi proliferation.

Molecular analysis show that Aspasia most closely related important genera are Miltonia and Brassia, which are included in one of the eight clades that form the subtribus Oncidiinae of tribus Cymbidieae.

They can be easily separated from each other for A. silvana is a larger plant with longer rhizome and pseudobulbs that have an elongated base making them much taller than the ones of A. lunata.

Other less noticeable differences include: A. epidendroides has broad transverse markings on the lateral sepals, the column with an elliptic depression below the stigma and the apical half of the labellum is porrect while A. principissa has narrow longitudinal stripes on the lateral sepals, the column with a narrow linear groove below the stigma and the apical half of the labellum is not porrect.

It is vegetatively close to A. epidendroides, with large elliptic and highly flat pseudobulbs, it shows the same colors of the later, but has narrower flowers with the labellum proportionally much smaller.