Views: 6 Author: Mycosystema Publish Time: 2023-10-12 Origin: Mycosystema
In southwest China, spruce or fir forests are distributed in areas with abundant rainfall and an altitude of 3400 to 3700 m. In such forests, it is common to see a variety of large fungi in the summer, one of which is the endemic species Boletus sinoedulis.
The cap of Boletus sinoedulis is 10-12 cm in diameter, nearly hemispherical to flat, with a dry and smooth surface. It is light yellowish brown to dark brown when young, and light yellowish brown to light olive brown when mature, with slightly lighter edge color. Its flesh is white and does not change color when injured. The surface of its hymenium is covered with a layer of white hyphae when it is young. When it matures, the white mycelium disappears. The surface of the hymenium is light yellow to light yellowish brown. Its bacterial tubes are the same color as the surface of the hymenium, and the diameter of the tube mouth is Less than 1 mm, often polygonal, and does not change color after injury. The stipe is 5 to 10 cm long, 1 to 3 cm in diameter, rod-shaped to nearly cylindrical, white, light gray to light yellow, with light white or light yellow reticulation on the surface. Usually the reticulation is dense at the top of the stipe and gradually becomes darker downwards. Sparse. The basidiospores are 14-17.5 μm long, 5-6.5 μm wide, and nearly fusiform. The cap epidermis is composed of upright, nearly rod-shaped, ellipsoid-fusiform to nearly spherical cells.
Boletus sinoedulis is found in spruce or fir understory in the alpine areas of southwest Asia, and it closely resembles B. edulis. However, B. edulis is mainly distributed in the temperate regions of Eurasia and is also found in Northeast my country. Its cap epidermis is composed of upright, filamentous cells. Boletus sinoedulis is often purchased for food use.
