Overview
The Bleeding Tooth Fungus (Hydnellum peckii), famously known as the ‘strawberries and cream’ or red-juice tooth, is an extraordinary hydnoid mycorrhizal mushroom native to northern boreal conifer forests. Resembling a dollop of whipped cream decorated with glistening rubies, this surreal forest dweller is renowned for exuding vibrant drops of crimson nectar from its velvety white cap.
Biology and Physical Characteristics
Young fruiting bodies of Hydnellum peckii emerge with an irregular, bulbous white cap covered in soft, velvety hairs. During periods of rapid metabolic growth in moist weather, the fungus undergoes guttation—a physiological process where excess moisture under root pressure is forced out through surface pores, forming viscous, bright crimson beads that look remarkably like fresh blood droplets. Beneath the cap, rather than gills or pores, it bears hundreds of slender, tooth-like spines (hydna) that produce reproductive spores.
Behavior and Ecology
Hydnellum peckii is an essential mycorrhizal mutualist that forms complex underground root sheaths with coniferous trees, particularly lodgepole pine, Douglas fir, and Norway spruce. The fungus provides its host tree with enhanced absorption of dissolved phosphorus, nitrogen, and minerals from nutrient-poor subalpine soils, receiving essential photosynthetic sugars in return. Chemical analysis of its red guttation fluid reveals high concentrations of atromentin, a potent natural anticoagulant compound possessing properties similar to heparin.
Conservation and Human Impact
Evaluated as Least Concern globally due to extensive subalpine conifer habitats across North America and Siberia, Hydnellum peckii is nevertheless experiencing noticeable declines across central Europe. Increased atmospheric nitrogen deposition from industrial emissions and commercial clear-cutting of old-growth mossy spruce forests disrupt the sensitive underground fungal mycelium.
Interesting Factoid
The fake ‘blood’ oozing from the bleeding tooth fungus contains atromentin, a natural biochemical anticoagulant so effective that pharmaceutical researchers study it as a potential medical blood thinner!
Last updated: October 2026