Yellow stagshorn

Yellow stagshorn (Calocera viscosa) is a jelly fungus belonging to the Dacrymycetaceae family. While not a pathogen to healthy crops, it is a significant decomposer in forest pathology, commonly found on coniferous logs and stumps in various temperate regions worldwide.

The fungus acts as a saprotroph, meaning it feeds on dead organic matter. It produces enzymes that break down the lignocellulose complex of wood, significantly increasing the rate of decay in fallen coniferous timber. Its biological cycle depends heavily on the presence of moisture within the wooden substrate.

This fungus predominantly affects coniferous tree species such as spruce, pine, and fir. It colonizes decaying wood that is usually in contact with soil or moss, where moisture levels remain sufficiently high to support the growth of its gelatinous fruiting bodies.

Identification is straightforward due to the fungus's distinctive appearance. The fruiting bodies are bright yellow to orange, branched, and look like small antlers. They possess a rubbery and sticky texture, which is a key diagnostic feature distinguishing them from other woody fungi.

The impact of this fungus is primarily ecological, as it contributes to the natural recycling of nutrients in forest environments. Control measures are generally not required; however, regular forest maintenance, including the clearing of excessive slash and wood debris, can naturally limit the proliferation of wood-rotting fungi in specific areas.