Hydnum repandum

Hydnum repandum, commonly known as the wood hedgehog or sweet tooth, is a species of fungus belonging to the family Hydnaceae. It is notable for its distinctive spore-bearing structures which appear as tooth-like projections beneath its cap, rather than the gills or pores found in most other mushrooms. This feature makes it a member of the tooth fungi group, which is widely distributed across North America, Europe, and parts of Asia. The species thrives in both deciduous and coniferous forests, forming mycorrhizal associations with living trees, which is crucial for nutrient exchange between the fungus and its host.

Description

Hydnum repandum features a convex to flat cap that can range from 5 to 15 cm in diameter, often displaying an irregular shape. The cap's color varies from pale orange to a light brown. The underside of the cap is covered with soft, spine-like structures, ranging from 2 to 7 mm in length, which are responsible for spore dispersal. The stem of the mushroom is thick and can be either central or off-center, with a similar coloration to the cap.

The spores of Hydnum repandum are white, contributing to a white spore print, which is a key identifying feature. This species is considered edible and is sought after for its mild, sweet taste and firm texture, making it a popular choice among foragers.

Habitat and Distribution

Hydnum repandum is found in forests throughout the temperate regions of the Northern Hemisphere, including North America, Europe, and Asia. It forms symbiotic mycorrhizal relationships with a wide variety of trees, which include both deciduous species like oaks and beeches, and conifers such as pines and firs. This mushroom prefers moist, well-drained soils and is typically found in mossy areas of forests from late summer to fall.

Culinary Uses

Due to its pleasant taste and texture, Hydnum repandum is often used in culinary applications. It can be cooked in a variety of ways, including sautéing, boiling, and baking. It is a popular ingredient in soups, stews, and sauces, and can also be eaten on its own, seasoned with herbs and spices.

Conservation

While Hydnum repandum is not currently listed as endangered or threatened, its reliance on forest ecosystems makes it susceptible to habitat loss due to deforestation and climate change. Conservation efforts aimed at preserving forest habitats are essential for ensuring the continued survival of this species.

See Also

• Mycorrhiza
• Edible mushrooms
• Fungal ecology