Dog Vomit Slime Mold
Fuligo septica
Type: Slime Mold (Myxomycete)
Physical Characteristics
Commonly appears as a bright yellow, bile-colored, or white irregular mass with a crusty, porous texture. As it matures, the surface dries to a darker tan or brown. It can reach sizes of up to 20 cm in diameter and has a foamy, sponge-like internal structure containing dark spores.
Habitat & Growing Conditions
Found on decaying wood, mulch, leaf litter, and occasionally on living grass or ornamental plants. It thrives in moist, shaded environments where organic decomposition is occurring.
Season & Fruiting Time
Typically appears from late spring through early autumn, especially after heavy rains or periods of high humidity.
Similar Looking Species
Mucilago crustacea (White Slime Mold), which is generally whiter and has a more distinctly beaded or crystalline texture compared to the smoother early stages of Fuligo septica.
Ecological Role
It is a saprobic organism that acts as a decomposer. It moves via a plasmodial stage to feed on bacteria, spores, and other organic matter, playing a vital role in nutrient cycling within soil and mulch ecosystems.
Safety reminder
AI mushroom identification is a best-effort estimate and can be wrong. Never use it to decide whether a mushroom is safe to handle or eat — always confirm with a qualified mycologist before any consumption.
Identified on: 4/10/2026
Mode: Standard