''Tylopilus ammiratii'' is a

fungus A fungus ( : fungi or funguses) is any member of the group of eukaryotic organisms that includes microorganisms such as yeasts and molds, as well as the more familiar mushrooms. These organisms are classified as a kingdom, separately from th ...

of the genus '' Tylopilus'' found in

California California is a U.S. state, state in the Western United States, located along the West Coast of the United States, Pacific Coast. With nearly 39.2million residents across a total area of approximately , it is the List of states and territori ...

, where it fruits scattered or in groups under

black oak Black Oak may refer to: Places in the United States * Black Oak, Arkansas * Black Oak, Daviess County, Indiana * Black Oak, Lake County, Indiana, a neighborhood of Gary, Indiana * Black Oak, Missouri Other * Black Oak Arkansas, American band ** ...

. Fruiting occurs from October to December. It was described as new to science by mycologist

Harry Delbert Thiers Harry Delbert Thiers (January 22, 1919 in Fort McKavett, Texas – August 8, 2000 in Ohio) was an American mycologist who studied and named many fungi native to North America, particularly California. Thiers taught mycology at San Francisco St ...

in 1975. The

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collection was made in Shasta County in November 1971 by Joseph Ammirati, for whom the species is named.

Fruit bodies The sporocarp (also known as fruiting body, fruit body or fruitbody) of fungi is a multicellular structure on which spore-producing structures, such as basidia or asci, are borne. The fruitbody is part of the sexual phase of a fungal life cyc ...

of ''T. ammiratii'' have convex, brownish caps measuring in diameter. The pore surface on the cap underside is initially white before turning to brown in maturity. They number about 1–2 per millimeter, and will stain vinaceous to brown when injured. The stipe measures long by thick. It has a smooth to slightly scurfy surface (i.e., covered with tiny flakes), and generally lack reticulations, although occasionally the stipe apex is slightly reticulate. Spores are smooth-walled, somewhat spindle-shaped (subfusoid) to cylindric, and typically measure 8.6–11.4 by 3.3–4

μm The micrometre ( international spelling as used by the International Bureau of Weights and Measures; SI symbol: μm) or micrometer (American spelling), also commonly known as a micron, is a unit of length in the International System of Unit ...

. Closely related '' Tylopilus'' species include '' T. indecisus'' and '' T. ferrugineus''.

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* ammiratii Fungi described in 1975 Fungi of the United States Fungi without expected TNC conservation status Fungus species {{Boletales-stub

See also

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External links