Sphagnum Brownie
Hypholoma elongatum
The Sphagnum Brownie is a specialized fungus in the Strophariaceae family, occurring almost exclusively in wet raised bogs and transition mires. It lives saprotrophically, decomposing dead parts of Sphagnum mosses. A characteristic feature is its very long, thin, and fragile stem relative to the small cap, which is anchored deep within the moss cushions. Fruiting bodies typically appear gregariously between late summer and late autumn.
Details
Identification
Cap 1-3 cm wide, pale yellow to olive-yellowish, hygrophanous; stem remarkably long (up to 10 cm) and thin; gills initially whitish-yellow, later grey-violet; spore print dark violet.
Diet
Saprotrophic; obtains nutrients by decomposing organic matter, particularly dead Sphagnum mosses.
Overwintering
Survival as mycelium within the moss substrate.
Ecology
Ecological role
Important primary decomposer in extremely nutrient-poor bog ecosystems; contributes to the nutrient cycle.
Natural predators
Insect larvae, slugs.
Competitor species
Other bog-dwelling fungi such as the Heath Brownie (Hypholoma ericaeum).
Ecosystem service
Nutrient recycling in wetlands.
Threats
Habitat destruction through drainage of bogs, peat extraction, and nitrogen deposition (eutrophication).
Scientific profile
Profile
Distinguishing features
Key features include the extremely long, slender stem relative to the small cap, the exclusive occurrence in peat moss (Sphagnum), and the olive-grey color of mature gills. Microscopically, the relatively small, smooth spores (approx. 7.5–9.5 x 4–5 µm) are characteristic.
Habitat
Nutrient-poor, acidic sites such as raised bogs, transition mires, and wet heathlands; strictly acidophilous and hygrophilous.
Reproduction
Sexual reproduction via basidiospores formed on four-spored basidia.
Protection & threats
Main threats
Habitat destruction through drainage of bogs, peat extraction, eutrophication (nitrogen deposition), and climate change (drying out).
Conservation measures
Protection and restoration of bogs, rewetting of former extraction sites, establishment of buffer zones to prevent nutrient input.