Genus of about 50 species of usually erect, rhizomatous perennials and subshrubs from rainforest of tropical regions of Notrh America, Central America, and South America. Kohleria is a genus of New World gesneriads, many of which are in cultivation as house plants. They have large trumpet-shaped flowers. Kohleria lose its leaves in winter. Plant the rhizomes about 1/2 in. below the surface and keep fairly dry until growth appears. The plants produce flowers which are orange or red with yellow-specled mouths.