under_the_duff 的鑑定

Large mushroom with a greater than 9 inch wide cap growing at edge of oak woodland in leaf litter.

An iNaturalist Introduction to Mushrooming, 6-minute Utube video by Christian Schwartz (leptonia on INat) https://www.youtube.com/watch?v=LKF_pIY0Zpc

Barrow's Bolete (Boletus barrowsii) A.k.a. White King Bolete after its pale colored cap. The cap is 5–25 cm (2–10 inches) in diameter, initially convex in shape before flattening, with a smooth or slightly tomentose surface, and gray-white, white or buff color. The thick flesh is white and does not turn blue when bruised. The pores are initially whitish, later yellow. It is an edible and highly regarded fungus in the genus Boletus that inhabits western North America. The White King Bolete is found under Ponderosa pine (Pinus ponderosa) inland, and Coast Live Oak (Quercus agrifolia) closer to the west coast. It was considered a color variant of the similarly edible B. edulis for many years. https://www.inaturalist.org/taxa/129328-Boletus-barrowsii

Barrow's Bolete (Boletus barrowsii) https://www.mykoweb.com/CAF/species/Boletus_barrowsii.html
"Habitat: In California Boletus barrowsii is usually associated with Oak (Quercus). Boletus barrowsii is easy to identify with the following characteristics: pale coloration, white tubes that are 'stuffed' when young, reticulated stipe, mild taste, lack of bruising reactions and typical (in California) association with Oak. It is edible and choice." https://www.mykoweb.com/CAF/species/Boletus_barrowsii.html

Mushrooms of the Redwood Coast: Comprehensive Guide to the Fungi of Coastal Northern California, Siegel and Schwarz, 2016, pp. 422-428.

Boletes are fleshy mushrooms with tubes rather than gills, the tube layer usually easily separable from the cap; stipe mostly central; terrestrial, occasionally on rotting wood.
Fungi of California: https://mykoweb.com/CAF/skey.html

California Mushrooms: The Comprehensive Identification Guide, D. Desjardin, M. Wood, and F. Stevens, 2nd printing 2019.

Fungi of California: https://mykoweb.com/CAF/skey.html and Home page https://www.mykoweb.com/index.html and https://www.mykoweb.com/CAF/ and https://www.mykoweb.com/CAF/keys/index.html