Hydnum repandum, commonly known as the sweet tooth, wood hedgehog or hedgehog mushroom, is a basidiomycete fungus of the family Hydnaceae. First described by Carl Linnaeus in 1753, it is the type species of the genus Hydnum. The fungus produces fruit bodies (mushrooms) that are characterized by their spore-bearing structures—in the form of spines rather than gills—which hang down from the underside of the cap. The cap is dry, colored yellow to light orange to brown, and often develops an irregular shape, especially when it has grown closely crowded with adjacent fruit bodies. The mushroom tissue is white with a pleasant odor and a spicy or bitter taste. All parts of the mushroom stain orange with age or when bruised.
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 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.
Hydnellum fuscoindicum is a species of tooth fungus in the genus Hydnellum. It is found in the Pacific Northwest in moss around western hemlocks. It produces fruit bodies with a violet-black cap, violet flesh, and violet spines on the cap underside. The odor and taste are very farinaceous. The fungus was first described by Kenneth A. Harrison in 1964 as a species of Hydnum, then transferred to Sarcodon in 1967 by Rudolph Arnold Maas Geesteranus. He placed this species in section Violacei of Sarcodon, along with H. fuligineoviolaceum and H. joeides.
Hydnellum cyanopodium, commonly known as the blue foot or bleeding blue tooth, is an inedible fungus in the family Bankeraceae. It occurs in the Pacific Northwest region of North America.
Hydnellum cruentum is a tooth fungus in the family Bankeraceae. Found in Nova Scotia, Canada, it was described as new to science in 1961 by mycologist Kenneth A. Harrison. Fruitbodies grow singly, in groups, or as fused masses under spruce. Individual caps measure 3–10 cm (1.2–3.9 in) in diameter, and have a club- or cushion-like shape. They are initially light brown, but darken somewhat in maturity. Young fruitbodies can exude droplets of red juice. Spines on the cap underside are lilac to dark blue, and up to 4 mm long. The angular spores are angular, with 4 to 6 unusually prominent outgrowths, and measure 4–4.5 by 3.5–4.5 µm. Harrison described the spores as "so irregular that some resemble stout metal jackstones." The flesh is pale gray to pale brown, and has a strong "medicinal" odor.
Hydnellum multiceps is a rare species of tooth fungus in the family Bankeraceae. Found in Nova Scotia, Canada, it was described as new to science in 1961 by mycologist Kenneth A. Harrison. The fungus has fruitbodies of overlapping and fused caps. Single caps measure 3–5 cm (1.2–2.0 in) in diameter, while fused masses can be up to 30 cm (12 in) in diameter and 8 cm (3 in) tall. The upper cap surface is initially pale brown but darken in maturity. The greyish-brown to dark brown spines on the cap underside measure 2–5 mm long. The fungus has been recorded growing as a partial fairy ring measuring about 20 ft (6 m) in diameter, in spruce woods in Glenmont, Nova Scotia; it has also been recorded from Cape Breton Island. The spores are roughly spherical with sharp processes, and dimensions of 3–4.5 by 3–4 µm.
Hydnellum scrobiculatum, commonly known as the ridged tooth, is a tooth fungus in the family Bankeraceae. Widely distributed in the Northern Hemisphere, it is found in Asia, Europe, and North America.
Phellodon niger, commonly known as the black tooth, is a species of tooth fungus in the family Bankeraceae, and the type species of the genus Phellodon. It was originally described by Elias Magnus Fries in 1815 as a species of Hydnum. Petter Karsten included it as one of the original three species when he circumscribed Phellodon in 1881. The fungus is found in Europe and North America, although molecular studies suggest that the North American populations represent a similar but genetically distinct species.
Hydnellum underwoodii is an inedible species of tooth fungus in the family Bankeraceae. Found in North America, it was described as new to science in 1906 by American mycologist Howard James Banker. Its reddish-brown, convex to flattened cap measures 5–14 cm (2.0–5.5 in) in diameter. Reddish-brown, partially erect scales adorn the cap surface. Spines on the cap underside are 1–3 mm long; they are initially white, becoming brown with grayish tips in age. The oval to spherical spores are 6–7.5 by 5.5–6.5 µm. The fungus fruits singly or scattered, on the ground in coniferous forests.
Sarcodon harrisonii is a species of tooth fungus in the family Bankeraceae. Found in the southeastern United States, it was described as new to science in 1985 by Richard Baird. The type collection was made near Asheville, North Carolina. The fruit body has a flattened cap up to 17 cm (6.7 in) wide with a leathery surface texture that is reddish brown to dark brown. Spores are more or less spherical, measuring 7–8 by 6–7.5 µm. S. harrisonii is similar in appearance to the Michigan species S. ustalis. The specific epithet honors Canadian mycologist Kenneth A. Harrison for his work on stipitate hydnums.
Sarcodon dissimulans is a species of tooth fungus in the family Bankeraceae. Found in Nova Scotia, Canada, it was described as new to science in 1984 by mycologist Kenneth A. Harrison. It is characterized as having an "extremely nauseating" taste. Its spores are roughly spherical to oblong, measuring 5–6 by 4–5 µm.
Sarcodon rimosus, commonly known as the cracked hydnum, is a species of tooth fungus in the family Bankeraceae. Found in the Pacific Northwest region of North America, it was described as new to science in 1964 by mycologist Kenneth A. Harrison, who initially called it Hydnum rimosum. He transferred it to the genus Sarcodon in 1984. Fruit bodies of S. rimosum have convex to somewhat depressed caps that are 4–12 cm (1.6–4.7 in) in diameter. The surface becomes scaly in age, often developing conspicuous cracks and fissures. It is brown with violet tints. The flesh lacks any significant taste and odor. Underneath the cap cuticle, the flesh turns a bluish-green color when tested with a solution of potassium hydroxide. The brownish-pinks spines on the cap underside are typically 2.5–7 mm long, extending decurrently on the stipe. Spores are roughly spherical with fine warts on the surface, and measure 5–6.5 by 4.5–5 µm. The hyphae do not have clamp connections.
Sarcodon lanuginosus is a species of tooth fungus in the family Bankeraceae. It was described as new to science in 1961 by mycologist Kenneth A. Harrison, who initially called it Hydnum lanuginosum. He transferred it to the genus Sarcodon in 1984. It is found in Nova Scotia, Canada, where it fruits on the ground singly or in groups under spruce and fir. The type collection was made in Cape Split, Kings County.
Sarcodon cyanellus is a species of tooth fungus in the family Bankeraceae. Found in the Pacific Northwest region of North America, where it associates with Pinaceae, it was described as new to science in 1964 by mycologist Kenneth A. Harrison, who initially called it Hydnum cyanellum. He transferred it to the genus Sarcodon in 1984. It has a vinaceous-violet to bluish-black cap.
Sarcodon calvatus is a species of tooth fungus in the family Bankeraceae. It was described as new to science in 1964 by mycologist Kenneth A. Harrison, who initially called it Hydnum calvatum. He transferred it to the genus Sarcodon in 1984. It is found in North America.
Sarcodon wrightii is a species of tooth fungus in the family Bankeraceae. It was first described in 1860 by Miles Berkeley and Moses Ashley Curtis as Hydnum wrightii. They were sent a specimen collected from Japan as part of the North Pacific Exploring and Surveying Expedition (1853–56). Rudolph Arnold Maas Geesteranus transferred it to the genus Sarcodon in 1967. The fungus produces roughly spherical spores that are tuberculate and measure 5.5–6.5 by 4.5–5.5 μm.
Hydnellum joeides is a species of tooth fungus in the family Bankeraceae.
Sarcodon thwaitesii is a species of tooth fungus in the family Bankeraceae. It is found in Asia, Europe, and New Zealand, where it fruits on the ground in mixed forest.
Sarcodon leucopus is a species of tooth fungus in the family Bankeraceae. Found in Asia and Europe, it was described as new to science in 1825 by Christian Hendrik Persoon. Mycologists Rudolph Arnold Maas Geesteranus and John Axel Nannfeldt transferred it to the genus Sarcodon in 1969. Fruit bodies of the fungus have flattened to slightly depressed caps up to 20 cm (8 in) in diameter. The surface texture, initially finely felt-like, later cracks to form shiny scales. Its color is pale purplish-brown to dark brown. The stipe measures 4–8 cm (1.6–3.1 in) long by 2–6 cm (0.8–2.4 in) thick. Spines on the cap underside are up to 15 mm long and about 1 mm thick. The flesh has a disagreeable odor, and a bitter taste. Spores are roughly spherical, typically measuring 7.2–7.9 by 4.5–5.6 µm. The fungus is considered endangered in Switzerland.
Sarcodon subfelleus is a species of tooth fungus in the family Bankeraceae. It was described as new to science in 1961 by mycologist Kenneth A. Harrison, who initially called it Hydnum subfelleum. He transferred it to the genus Sarcodon in 1984. It is found in Nova Scotia, Canada, where it fruits on the ground singly or in groups under spruce and fir. The type collection was made in Glenmont, Kings County.
