Cosmibuena is a genus of flowering plants in the family Rubiaceae.

The inflorescence is a terminal cluster or sometimes a solitary flower.

The fruit is a woody capsule containing papery winged seeds.

[3] These plants grow in wet lowlands, mountain forests, and mangroves.

[3] Four species are recognized as of May 2014:[2] This Cinchonoideae article is a stub.