Genus: 2 species.
Billia is thought to consist of two species; a red-flowered species,
Region: Mexico, northern Panama.
BotanyLeaves: tripartite, sometimes 2 or 4.
Inflorescence: hairs white or lacking on stalk; the flowering branch has full-sized leaves just below it or smaller leaves that sometimes fall off.
Flowers: red; sepals 4; petals 4, zygomorhic; stamen 4.
Pollination: insects.
Fruits: large, brown, capsules; 1 to 3 seeds.