Korthalsella emersa is a flowering plant in the sandalwood family, formerly placed in the Viscaceae.

The specific epithet alludes to the immersion of the flowers in the floral cushion.

There are up to 30 flowers in a cluster, immersed in a floral cushion with black-tipped hairs.

[1] The species is endemic to Australia’s subtropical Lord Howe Island in the Tasman Sea.

Recorded host species include Elaeodendron curtipendulum and Jasminum simplicifolium.