[1] Larsenianthus species grow as evergreen, perennial herbaceous plants that can reach heights of 1 to 2.5 meters.

Depending on the species, the plants have two to twelve alternately arranged, sessile or stalked leaves.

Depending on the type, 35 to 80 curved or flat, scale-like bracts are connected at the base with the inflorescence and are arranged in a spiral.

The elongated, spade- or inverted-lanceolate labellum is broad at the tip and becomes narrower towards the base of the leaf.

[2] The natural range of Larsenianthus species includes northeastern Bangladesh, northeastern India, and northern Myanmar The first description of the genus Larsenianthus was made in 2010 by Walter John Emil Kress and John Donald Mood in phytokeys, No.

The genus name Larsenianthus honors Kai Larsen(1926–2012) from Aarhus University in Denmark, an expert in the systematics of the Zingiberaceae.