close up photo of the spines of a bear's head fungus (aka western coral hedgehog, hericium abietis) in the

hericium mushroom autumn fungus rare endangered woodland landscape botany edible forest tree trunk wood nature wildlife ecology biodiversity preservation conservation growth textured spines coral delicate unique natural organic environment mycelium decomposition decay nutrient ecosystem habitat species medicinal culinary gourmet gastronomic foraging flora fauna outdoors adventure exploration