Porphyrellus porphyrosporus
Species of fungus
From Wikipedia, the free encyclopedia
Porphyrellus porphyrosporus, commonly known as the dusky bolete, is a rare fungus belonging to the family Boletaceae. With its purple-brown cap and stem, P. porphyrosporus is not easy to spot, despite its large size. It is a large (both cap diameter and stem length up to 15 cm) brown bolete. Found in Europe and North America in summer and autumn, the species occurs under trees.
| Porphyrellus porphyrosporus | |
|---|---|
| |
Scientific classification  | |
| Kingdom: | Fungi |
| Division: | Basidiomycota |
| Class: | Agaricomycetes |
| Order: | Boletales |
| Family: | Boletaceae |
| Genus: | Porphyrellus |
| Species: | P. porphyrosporus |
| Binomial name | |
| Porphyrellus porphyrosporus | |
| Synonyms[1] | |
| Porphyrellus porphyrosporus | |
|---|---|
| Mycological characteristics | |
 | Pores on hymenium |
 | Cap is convex |
 | Hymenium is adnate |
 | Stipe is bare |
 | Spore print is purple to brown |
 | Ecology is mycorrhizal |
 | Edibility is inedible |
Description
This mushroom has a dark brown cap, usually with a paler margin.[2] Initially convex, caps expand and sometimes become irregularly lobed. It is 6 to 15 cm (2+1⁄4 to 6 in) in diameter[3] when fully expanded, and the caps have soft buff flesh with a vinaceous tinge. The tubes are similar in colour to the cap, and when cut or bruised, turn blue-green.[2] The stem is 5 to 16 cm (2 to 6+1⁄4 in) tall and 1 to 3 cm (3⁄8 to 1+1⁄8 in) in diameter, equal or clavate,[3] tobacco brown and slightly velvety to the touch when young, becoming smooth as the fruit body matures. The flesh is white, producing blue stains which change color.[4] The mushroom has a mild to pungent smell and a mild to bitter taste.[4] The spore print is reddish-brown.[4]
Similar species
It might overlap with P. atrofuscus and P. olivaceobrunneus.[4] Tylopilus griseocarneus[4] and T. indecisus are similar.[3]
