Extract from Wikipedia article: Hydnellum ferrugineum, commonly known as the mealy tooth or the reddish-brown corky spine fungus, is a species of tooth fungus in the family Bankeraceae. A widely distributed species, it is found in north Africa, Asia, Europe, and North America. The fungus fruits on the ground singly or in clusters in conifer forest, usually in poor (low nutrient) or sandy soil. Fruit bodies are somewhat top-shaped, measuring 3–10 cm (1–4 in) in diameter. Their velvety surfaces, initially white to pink, sometimes exude drops of red liquid. The lower surface of the fruit body features white to reddish-brown spines up to 6 mm long. Mature fruit bodies become dark reddish brown in color, and are then difficult to distinguish from other similar Hydnellum species. H. ferrugineum forms a mat of mycelia in the humus and upper soil where it grows. The presence of the fungus changes the characteristics of the soil, making it more podzolized.
Young mealy tooth mushrooms (Hydnellum ferrugineum) with red liquid between Orekhovo and Lembolovo, north from Saint Petersburg. Russia, July 27, 2016 Unnamed Road, Leningradskaya oblast', Russia
Mealy tooth mushroom (Hydnellum ferrugineum, Bankeraceae) near Orekhovo, north from Saint Petersburg. Russia, August 13, 2016 Unnamed Road, Leningradskaya oblast', Russia
Young mealy tooth mushroom (Hydnellum ferrugineum, Bankeraceae) near Orekhovo, north from Saint Petersburg. Russia, August 13, 2016 Unnamed Road, Leningradskaya oblast', Russia
Mealy tooth mushroom (Hydnellum ferrugineum)(?) in Orekhovo, north from Saint Petersburg. Russia, August 17, 2016 Unnamed Road, Vaskelovo, Leningradskaya oblast', Russia, 188731
Dissected mealy tooth mushroom (Hydnellum ferrugineum)(?) near Vyritsa, 50 miles south from Saint Petersburg. Russia, August 22, 2018 Leningrad Oblast, Russia, 188357
Mealy tooth mushrooms (Hydnellum ferrugineum, Bankeraceae) near Orekhovo, north from Saint Petersburg. Russia, August 24, 2018 Unnamed Road, Vaskelovo, Leningradskaya oblast', Russia, 188731
Mealy tooth mushroom (Hydnellum ferrugineum) near Dibuny, north-west from Saint Petersburg. Russia, August 25, 2018 Leninskaya Tropa, Pesochny, Sankt-Peterburg, Russia
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