### Identification Stumbling upon *Macrocybe titans* is a shock to the system; it is quite literally the behemoth of the fungal world. The cap is colossal, ranging from 10cm to a staggering 100cm in diameter. It begins convex but flattens with age, sporting a matte, leathery texture in shades of creamy buff to pale tan. Beneath the cap, the gills are crowded, white to pale yellow, and notched where they meet the massive, fibrous stipe (stem). This stipe is often bulbous at the base and can be as thick as a human forearm. To distinguish it from the common toxic "Vomiter" (*Chlorophyllum molybdites*), look for a white spore print and the absence of a ring on the stem.
### Habitat & Range This subtropical powerhouse thrives in the Caribbean, Central and South America, and the Southern United States—particularly Florida. It is an "anthropogenic" specialist, frequently appearing in disturbed sites like lush lawns, pastures, and rich mulch beds. You won't typically find it deep in the woods; it prefers open, sunny areas with nutrient-dense soil.
### Behaviour *M. titans* is a gregarious giant, often appearing in "cespitose" clusters (densely packed groups) after heavy tropical rains. An observer will notice its explosive growth; a specimen can go from a small button to the size of a dinner plate in just 48 hours. While it doesn't "move," its mycelium aggressively colonizes the subsurface, waiting for the perfect humidity spike to fruit.
### Diet As a saprobic species, *M. titans* is a vital decomposer. It "eats" by secreting enzymes that break down complex organic polymers—specifically dead wood, buried roots, and enriched soil—into simple sugars it can absorb.
### Fascinating Fact Living up to its name, the largest recorded *Macrocybe titans* was found in Chiapas, Mexico, in 2005. It weighed a massive 44 pounds and stood nearly three feet tall!