Luminomyces Ignis, from Latin “lumen” (light) and “ignis” (fire), is a bioluminescent fungus in tropical rainforest canopies. It features clustered fruiting bodies 5–25 cm tall, with broad, wavy, granular-textured gray-blue caps and densely packed pale gills. The stout, textured stipe supports mycelial mats colonizing woody substrates. Bioluminescence occurs along gills and base, emitting a cool blue-green glow (450–495 nm) via a luciferin-luciferase system unique to the Aetherium Arborescens cluster. Thriving in warm, humid environments, it decomposes woody matter, aiding nutrient cycling. Classified in family Mycenaceae, genus Luminomyces, order Agaricales, it disperses spores by airborne basidiospores attracted to nocturnal insects. Rare but stable, L. Ignis plays a vital role in canopy biodiversity and ecosystem health.