Patrick Brandon Matheny

Inosperma erubescens (formerly Inocybe erubescens, also formerly named I. patouillardii), and also commonly known as the deadly fibrecap, brick-red tear mushroom or red-staining Inocybe, is a poisonous basidiomycete fungus, one of many in the original genus Inocybe and one of the few known to have caused death. It is found growing in small groups on leaf litter in association with beech. All mushroom guidebooks as well as mushroom hunters advise that the entire Inocybaceae should be avoided for consumption. The fruit bodies (i.e., the mushrooms) appear in spring and summer; the bell-shaped

Inocybe rimosa (formerly known as Inocybe fastigiata), commonly known as straw-colored fiber head, is a poisonous mushroom native to Europe. Its toxic ingredient is muscarine, discovered during the 1930s. Serious poisoning can result from consuming any quantity of the mushroom. German naturalist Jacob Christian Schäffer described this species in 1774. Lucien Quélet transferred it to the genus Inocybe in 1872. The tan (or rarely whitish) cap is cone-shaped then expands, generally retaining an umbo and a darker center. Its surface is fibrous. The gills are light grayish and brown with age. The

Inosperma maculatum, formerly known as Inocybe maculata and commonly known as the frosty fibrecap or brown inocybe, is a species of mushroom in the family Inocybaceae. It was first described by Jean Louis Émile Boudier in 1885. It is a medium-sized brown mushroom with a fibrous, brown cap with white remnants of a universal veil in the middle. The stem is cream or brown. The species is ectomycorrhizal and grows at the base of various trees, including beech. Inosperma maculatum is found throughout Eurasia and North America. It is poisonous, containing muscarine. Possible symptoms include

Cyclocybe erebia, also known as the dark fieldcap, or sometimes Agrocybe erebia, is a species of brown-spored agaric with a wide distribution.

Inosperma cookei, commonly known as the straw fibrecap, is a species of mushroom in the family Inocybaceae. It was first described in 1892 by Giacomo Bresadola, and is named in honour of Mordecai Cubitt Cooke. The species is found in Europe, Asia, and North America. It produces small mushrooms of an ochre colour, with a prominent umbo, fibres on the cap and a distinctive bulb at the base of the stem. It grows from soil in mixed woodland, and is encountered in summer and autumn, though is not common. Ecologically, it feeds through use of ectomycorrhiza. Inosperma cookei has been described as

Inosperma calamistratum, until 2019 known as Inocybe calamistrata, is a species of Inocybaceae fungus. The tannish cap is up to 5 centimetres (2 in) wide. The stem is up to 15 cm (6 in) long, possibly staining reddish above and/or blue-green below. The beige gills are fairly close and produce a brown spore print. The scent is typically pungent. Perhaps similar are Inocybe calospora, which does not stain, and I. tahquamenonensis, which is purplish. The species is found in Europe and North America (July–September to the east; August–November by the West Coast). Orson K. Miller Jr. and Hope

Inosperma bongardii is an agaric fungus in the family Inocybaceae. It was originally described as a species of Agaricus by German botanist Johann Anton Weinmann in 1836. Lucien Quélet transferred it to the genus Inocybe in 1872. A 2019 multigene phylogenetic study by Matheny and colleagues found that I. bongardii and its relatives in the subgenus Inosperma were only distantly related to the other members of the genus Inocybe. Inosperma was raised to genus rank and the species became Inosperma bongardii. It is a common species with a widespread distribution. Fruit bodies grow on the ground,

Inosperma adaequatum, known as Inocybe adaequata until 2019, is a species of fungus in the family Inocybaceae found in North America and Europe.

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Inocybe calamistratoides is a species of Inocybaceae fungus found in New Zealand.

Inosperma is a genus of gilled mushroom in the family Inocybaceae. Previously defined as a subgenus within the large genus Inocybe by Robert Kühner in 1980, these fungi were found to be more distantly related in a 2019 multigene phylogenetic study by Matheny and colleagues.

Pseudotricholoma is a genus of fungi in the family Tricholomataceae. The genus contains three species known from North America. Europe, and the Azores. Basidiocarps (fruit bodies) resemble those of the genus Tricholoma, with a dry fibrillose pileus and white to brown lamellae that have adnate to emarginate attachment and stain reddish when damaged, eventually turning black. Microscopically, the basidiospores are smooth, ellipsoid to ellipsoid-oblong, thin-walled and amyloid. Cheilocystidia are rare to absent and pleurocystidia are absent. The pileipellis is a cutis and clamp connections are

Pseudosperma is a genus of mushrooms in the family Inocybaceae. It is widely distributed, being found in both temperate and tropical regions. Pseudosperma was once considered to be part of the genus Inocybe. However, in 2020, Matheny et. al. split the genus into several other genera, including Pseudosperma.

Crassisporium is a burn-inhabiting agaric fungal genus that colonizes forest fire and campfire sites on ground and charred woody debris in Europe, north Africa and western North America. The small brownish fruitbodies have broadly attached lamellae bordered by cheilocystidia and there is an absence of pleurocystidia and chrysocystidia. Spores are thick-walled, brown, smooth, and have a germ pore. The cap surface (pileipellis) is neither gelatinized nor cellular. Clamp connections are present in the hyphae. The genus is most closely related to the genus Romagnesiella and together both are

Cleistocybe is a genus of fungi in the family Biannulariaceae. Basidiocarps (fruit bodies) are agaricoid, similar to those of Clitocybe, but with ephemeral traces of a partial veil and decurrent lamellae that are often greyish. The genus is separated on DNA characteristics as well as morphology. Species are known from North America, Europe, North Africa, and Tibet.

Auritella is a genus of fungi in the family Inocybaceae. The genus contains seven species found in temperate Australia and tropical Africa. The genus was circumscribed in a 2006 publication by Brandon Matheny and Neil Bougher. The original publication, however, was later discovered to be invalid because they were unintentionally described as provisional names (nom. prov.) instead of new names (sp. nov.). The authors properly published the genus later that year. In a 2019 molecular study, Matheny and colleagues used six genes to determine relationships within the family. They recovered

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Albomagister is a genus of fungi in the family Tricholomataceae. The genus contains just one named species known from Tennessee and North Carolina, however two other undescribed species have been sequenced. Albomagister was described by mycologists Marisol Sánchez-García, Joshua Birkebak & P. Brandon Matheny in 2014 with Albomagister subaustralis as the type species. Albomagister has a tricholomatoid stature and white gills with adnexed attachment. The spores are smooth, thin-walled and inamyloid. It is unique in the Tricholomataceae due to the presence of long and conspicuous cheilocystidia

Tubariomyces is a genus of fungi in the family Inocybaceae. The genus, circumscribed in 2010, contain two species known from Mediterranean Europe and possibly northern Africa.

Tubaria punicea is a rare species of agaric fungus in the family Tubariaceae. It is found on the west coast of North America, where it grows on the bases and in hollows of madrone (genus Arbutus).

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