Cyrtandra polyantha is a rare species of flowering plant in the African violet family known by the common names Niu Valley cyrtandra.

[3] The plant grows in ridgetop forests in steep habitat that can only be accessed by rappelling down to the area.

[1][2] The habitat on these mountain slopes is degraded by a number of forces, including feral pigs and exotic plant species, especially pamakani haole (Ageratina adenophora).

[2] Other potential threats include rats, snails, slugs, and researchers and conservationists who inadvertently collect too many of the seeds.

[2] Many seeds have been collected and some seedlings grown in the nursery; a few of these have been planted in an enclosure and appear to be thriving.