Neippergia C. Morren Acineta, abbreviated as Acn in horticultural trade, is a small genus belonging to the orchid family (Orchidaceae).

These epiphytic orchids occur in tropical mountainous forests from Mexico to western South America, at altitudes up to 2,000 m. They are sometimes lithophytic when found on steep embankments.

The species produce a pendent inflorescence, bearing racemes of many fragrant cup-shaped, pale yellow to reddish brown flowers.

The column of these orchids bears two pollinia, except in Acineta dalessandroi, which has four (making its classification in this genus doubtful).

These orchids are insect pollinated by male bees in the genus Eulaema or Eufriesia.