Fungi named in 1891

Lactifluus volemus, formerly known as Lactarius volemus, and commonly known as the weeping milk cap or bradley, is a species of fungus in the family Russulaceae. Phylogenetic analysis suggests that L. volemus represents several species or subspecies, rather than a single taxon. The colour of the mushroom varies from apricot to tawny, and the cap may be up to 11 cm (4+1⁄2 in) wide. The pale golden yellow gills on the underside of the cap are closely spaced and sometimes forked. One of the mushroom's most distinctive features is the large amount of latex it exudes when the gills are damaged,

Russula paludosa is an edible species of mushroom within the large genus Russula. It is common to Europe and North America.

Flammulina is a genus of fungi in the family Physalacriaceae. The genus, widespread in temperate regions, has been estimated to contain 10 species.

Terana caerulea (or Terana coerulea), commonly known as the cobalt crust fungus or velvet blue spread, is a saprobic crust fungus in the family Phanerochaetaceae. Usually found in warm, damp hardwood forests on the undersides of fallen logs and branches of deciduous trees, this unique fungus has been described as "blue velvet on a stick".

Sarcosoma globosum, or witches cauldron, is a species of fungus in the family Sarcosomataceae. It was first described in 1793 by Casimir Christoph Schmidel. Johann Xaver Robert Caspary transferred it to the genus Sarcosoma in 1891. Also known as the charred-pancake cup, it is a near-threatened fungus native to Northern Europe. It is rarely found in some parts of northeastern North America, particularly in the Great Lakes region. To biologists' surprise, in 2021 it was found in Northern British Columbia. The witches cauldron is an ascomycete or sac fungus, meaning that its microscopic

Biscogniauxia nummularia is a plant pathogen in the family Graphostromataceae, known as the beech tarcrust. The specific epithet is derived from the Latin "nummus" meaning a coin, referring to the often rounded and coin-like encrustations.

Biscogniauxia is a genus of fungi in the family Xylariaceae. Subtaxa include Biscogniauxia capnodes var. capnodes, Biscogniauxia marginata and Biscogniauxia nummularia, which are plant pathogens. The genus was circumscribed by Otto Kuntze in Revis. Gen. Pl. 2 on page 398 in 1891. The genus name of Biscogniauxia is in honour of Célestin Alfred Cogniaux (1841 – 1916), a Belgian botanist.

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Scutellinia setosa is a species of apothecial fungus belonging to the family Pyronemataceae. Its fruit bodies are disc-shaped with thick black "hairs" (setae) around the cup rim. The smooth, ellipsoid, spores measure 11–13 by 20–22 μm and contain numerous oil droplets. The asci (spore-bearing cells) are roughly cylindrical, measuring 300–325 μm by 12–15 μm. Originally described from Europe, it is also found in North America and Central America, where it grows on the rotting wood of deciduous trees.

Pleurotus australis, the brown oyster mushroom, is a gilled fungus native to Australia and New Zealand. It is found on dead wood, particularly mānuka and ngāhere. Although morphologically similar to some other Pleurotus fungi, it has been shown to be a distinct species incapable of cross-breeding.

Glugea is a genus of microsporidian parasites, predominantly infecting fish. Infections of Glugea cause xenoma formation. Currently, Phylogenetic tree of this genus seem unreliable, as not enough evidence is present, therefore species with their common hosts are given in a list: G. anomala (syn. G. weissenbergi) – a parasite of the three-spined stickleback and the ninespine stickleback G. atherinae – a parasite of the big-scale sand smelt G. berglax – a parasite of the roughhead grenadier G. bychowski – a parasite of the Caspian anadromous shad G. capverdensis – a parasite of the spotted

Cookeina is a genus of cup fungi in the family Sarcoscyphaceae, members of which may be found in tropical and subtropical regions of the world. Species may be found on fallen branches of angiosperms, trunks, and sometimes on fruits. The Temuans of Peninsular Malaysia are reported to use certain species from this genus as food, and also as a bait for fishing, where it is rubbed against the hook.

Clarkeinda is a genus of fungi in the family Agaricaceae. According to the Dictionary of the Fungi, the widespread genus contains five species. Species in this genus, especially Clarkeinda trachodes, are only distributed in south Asia and southeast Asia.

Aureobasidium is a genus of fungi belonging to the family Dothioraceae. The genus was first described by Pierre Viala and Gaston Boyer in 1891.

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Sarcosoma is a genus of fungi in the family Sarcosomataceae. The name Sarcosoma is derived from ancient Greek and means "fleshy body", from σάρξ (sárx, "flesh") σῶμα (sôma, "body"). The genus is widespread in north temperate areas.

Rimbachia is a genus of fungi in the family Tricholomataceae. The genus contains about ten species with a widespread distribution in tropical regions. The genus name of Rimbachia was chosen in honour of August Rimbach (1862–1943), who was a German botanist (Bryology). He was between 1910-1919, Professor of Botany at the Agronomic Institute in Montevideo, Uruguay. The genus was circumscribed by Narcisse Théophile Patouillard in Bull. Soc. Mycol. France vol.7 on page 159 in 1891.

Protoglossum is a genus of fungus in the family Cortinariaceae. Protoglossum was circumscribed by George Edward Massee in 1891.

Nephromopsis is a genus of lichenized fungi within the Parmeliaceae family.

Mycena leaiana, commonly known as the orange mycena or Lea's mycena, is a species of saprobic fungi in the genus Mycena, family Mycenaceae. They have bright orange caps and stalks and reddish-orange gill edges. Typically found in North America, a variety, M. leaiana var. australis, can be found in Australasia. The mushrooms usually grow in dense clusters on deciduous logs. The pigment responsible for the orange color in this species has antibiotic properties.

Hebeloma circinans is a species of mushroom in the family Hymenogastraceae.

Gymnoglossum is a genus of fungi in the Bolbitiaceae family of mushrooms.

Cookeina tricholoma, also known by its common name bristly tropical cup, is a species of fungus from the genus Cookeina.

Colletotrichum gossypii is a plant pathogen. This fungus is affiliated with cotton plants where it causes anthracnose. Its reproduction in the plants is asexual. The conidia have only one nucleus. Before conidia germination fusion by mean of conidial anastomosis tube could happen. The conidia could germinate in media plates.

Zodiomyces is a genus of fungi in the family Laboulbeniaceae. The genus contain 3 species.

Taphrina johansonii is an ascomycete fungus that is a plant pathogen. It causes "tongue" galls on poplar trees.

Scutellinia olivascens is a species of apothecial fungus belonging to the family Pyronemataceae. The species was described in 1876 by Mordecai Cooke as Peziza olivascens, but Otto Kuntze revised the genus to Scutellinia in 1891. The species resembles the abundant Scutellinia umbrorum and can only be reliably identified by microscopic features. Found in Europe, S. olivascens forms clusters of orange discs up to 1.5 cm in diameter on soil or rotting wood in summer and autumn.

Psoroglaena is a genus of lichen-forming fungi in the family Verrucariaceae. The genus was circumscribed by Johann Müller Argoviensis in 1891, with Psoroglaena cubensis assigned as the type species.

Metraria is a genus of two species of fungi in the family Agaricaceae.