filluam

Filluam is a fictional plant species used in speculative fiction and worldbuilding discussions. In the conventional fictional taxonomy, it is placed in the genus Filluma of the imagined family Luminaceae. The species is described as a herbaceous perennial reaching about 50 to 90 cm in height, with a single erect stem, broad ovate leaves, and loose panicles of small tubular flowers. A defining feature is its bioluminescent sap, which glows faintly in moonlight, and the seed capsules that emit a sweet, floral aroma when mature.

It is described as native to the humid forest margins of a chain of islands known as the Nerean Archipelago. It favors shaded, damp microhabitats on calcareous or clay-rich soils and often forms small clonal colonies. The plant engages in a mycorrhizal relationship with soil fungi and plays a modest role in the local nocturnal pollination web.

The oil extracted from the seed capsules is used in fictional perfumery and ritual lamps; the glowing sap serves as a light source for night travel in some lore. In worldbuilding contexts, Filluam is employed as an example of a flagship plant species illustrating luminous ecology and cultural symbolism.

See also: bioluminescence in plants; worldbuilding.