Larsenianthus careyanus grows as an evergreen, herbaceous plant that can reach heights of up to 2.15 meters.

The leafy shoots 3 to 4 centimeters thick at the base are in dense groups of ten to thirty.

The hairless underside of the leaf is blunt, green in color and has a slightly hairy central rib.

At the base, the stems have three glossy dark green and sparsely hairy leaf sheaths, which turn brown over time.

[1] The stalked inflorescence is formed as a coiled thyrsus at the tip of leafy shoots and can reach a total length of up to 35 centimeters.

These are colored green and have a wide, white corner and are egg-shaped with a length of around 3.5 and a width of around 3 centimeters.

Each flower has two yellow, wedge shaped with a length of 5 millimeters and a thickness of 1 mm and draft tube ovary.

[1] The natural range of Larsenianthus careyanus includes Bangladesh and the states of Arunachal Pradesh, Assam, Manipur, and Meghalaya in northeast India.

[1] The first description as Hitchenia careyana was made in 1883 by George Bentham in Genera Plantarum 3 S.

The specific epithet careyanus honors the English missionary and botanist William Carey.