Tylopilus alboater
| Tylopilus alboater | |
|---|---|
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| Scientific classification | |
| Kingdom: | Fungi |
| Division: | Basidiomycota |
| Class: | Agaricomycetes |
| Order: | Boletales |
| Family: | Boletaceae |
| Genus: | Tylopilus |
| Species: | T. alboater |
| Binomial name | |
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Tylopilus alboater (Schwein.) Murrill (1909) |
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| Synonyms | |
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Boletus alboater Schwein. (1822) |
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| Tylopilus alboater | |
|---|---|
| Mycological characteristics | |
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pores on hymenium |
 
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cap is convex or flat |
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hymenium is adnate |
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stipe is bare |
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spore print is pink |
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ecology is mycorrhizal |
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edibility: edible |
Boletus alboater Schwein. (1822)
Suillus alboater (Schwein.) Kuntze (1898)
Porphyrellus alboater (Schwein.) E.-J.Gilbert (1931)
cap is convex
Tylopilus alboater, commonly known as the black velvet bolete, is a bolete fungus in the Boletaceae family. The species is found in North America east of the Rocky Mountains, and in eastern Asia, including China, Japan, Taiwan, and Thailand. A mycorrhizal species, it grows solitarily, scattered, or in groups on the ground usually under deciduous trees, particularly oak, although it has been recorded from deciduous, coniferous, and mixed forests.
The fruit bodies have a black to grayish-brown cap that measures up to 15 cm (5.9 in) in diameter. The caps of young specimens have a velvety texture and are covered with a whitish to gray powdery coating; this texture and coating is gradually lost as the mushroom matures, and the cap often develops cracks. The pores on the underside of the cap are small and pinkish. The stem is bluish purple to black, and measures up to 10 cm (3.9 in) long by 4 cm (1.6 in) thick. Both the pore surface and the whitish cap flesh will stain pink to reddish gray, and eventually turn black after being cut or injured. The mushroom is edible, and generally considered one of the best edible Tylopilus species.
The species was first described in 1822 as Boletus alboater by Lewis David de Schweinitz from specimens he collected in North Carolina.Elias Magnus Fries sanctioned this name in his 1821 Systema Mycologicum. The species was one of several Boletus species that Otto Kuntze transferred to Suillus in his 1898 Revisio Generum Plantarum. American mycologist William Alphonso Murrill transferred it to the genus Tylopilus in 1909. In 1931, French mycologist Jean-Edouard Gilbert transferred the species to his newly created genus Porphyrellus, but this name has since been into Tylopilus.
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