Overview
The Orange Jelly Spot (Dacrymyces chrysospermus), historically known as Orange Jelly or the Golden Jelly Fungus, is a vibrant, gelatinous basidiomycete that adorns rotting conifer logs with brilliant glowing nuggets of translucent orange jelly. Renowned for its extraordinary ability to dry to a brittle crust in dry weather and miraculously rehydrate into plump, glowing cushions after rain, it brings vibrant color to winter woodlands.
Biology and Physical Characteristics
Dacrymyces chrysospermus produces small, convoluted, brain-like cushions or lobes that range from bright golden-yellow to deep glowing orange. Its texture is distinctly gelatinous, rubbery, and smooth. Under the microscope, it features specialized tuning-fork basidia (bifid basidia) characteristic of the order Dacrymycetales, producing large, curved, multi-septate spores that give it its scientific name (chrysospermus meaning ‘golden seeds’).
Behavior and Ecology
A specialized wood-decay saprotroph, Orange Jelly Spot colonizes dead, bark-free logs and branches of conifers—particularly pine (Pinus), spruce (Picea), and fir (Abies)—producing a brown rot that decomposes structural cellulose. It exhibits anhydrobiosis: during dry spells, it shrivels into an inconspicuous, hard, dark reddish-orange film, but within minutes of a soaking rain, it absorbs moisture and re-expands to its full, glowing jelly form.
Conservation and Human Impact
Assessed as Least Concern by the IUCN, Dacrymyces chrysospermus is common across northern coniferous forests. While non-toxic and technically edible, it is devoid of distinct flavor and is primarily celebrated by nature enthusiasts for its dazzling, jewel-like brightness on gloomy, rain-soaked forest floors.
Interesting Factoid
Orange Jelly Spot can survive total desiccation: when dried out by weeks of summer heat, it shrivels into a flat, paper-thin orange crust, only to spring back into plump, wet rubbery jelly within minutes of being touched by raindrops.