Delissea rhytidosperma is an endangered member of the Lobelia family found only on the island of Kauai. The lowland forest habitat where this species grows has been disturbed by overgrazing of domestic and wild animals, the encroachment of invasive nonnative plant species, and naturally occurring landslides. Currently, only 15 plants survive in two remaining wild populations. Measures are being taken to protect these remaining populations, including weed control, fire suppression and fencing to exclude animals and humans. Botanical gardens and seed banks are also working to conserve these plants and seeds.