Fungi named in 1890

Ustilago avenae is a plant pathogen. Semiloose smut of oats can be found wherever oats are grown, as they are seldom treated with seed treatments. The level of treatment is low because oats command a lower sale price than other cereals and hence it is thought that treatment is uneconomic. Smuts, unlike rusts, infect plants in arid climates, often infecting up to 20% of land and over half of the panicles in each field. As with wheat and barley the grains of semiloose smut infected oat plants are completely replaced by the smut fungus. It is not evident until heads emerge and is very difficult

Trichosporon is a genus of anamorphic fungi in the family Trichosporonaceae. All species of Trichosporon are yeasts with no known teleomorphs (sexual states). Most are typically isolated from soil, but several species occur as a natural part of the skin microbiota of humans and other animals. Proliferation of Trichosporon yeasts in the hair can lead to an unpleasant but non-serious condition known as white piedra. Trichosporon species can also cause severe opportunistic infections (trichosporonosis) in immunocompromised individuals.

Ustilago tritici is a plant pathogen infecting barley; rye and wheat.

Trechispora is a genus of fungi in the family Hydnodontaceae. Basidiocarps (fruit bodies) are variously corticioid (effused, patch-forming) or clavarioid (branched and coral-like) with spore-bearing surfaces that are variously smooth to hydnoid or poroid. The genus occurs worldwide, though individual species may be localized. Around 50 species have been described to date.

Mycena maculata, commonly known as the reddish-spotted Mycena, is a species of fungus in the family Mycenaceae. The fruit bodies, or mushrooms, have conic to bell-shaped to convex caps that are initially dark brown but fade to brownish-gray when young, reaching diameters of up to 4 cm (1+1⁄2 in). They are typically wrinkled or somewhat grooved, and have reddish-brown spots in age, or after being cut or bruised. The whitish to pale gray gills also become spotted reddish-brown as they mature. The stem, up to 8 cm (3 in) long and covered with whitish hairs at its base, can also develop reddish

Russula brevipes is a species of mushroom commonly known as the short-stemmed russula or the stubby brittlegill. The fruit bodies are white and large, with convex to funnel-shaped caps measuring 7–30 cm (3–12 in) wide set atop a thick stipe up to 8 cm (3 in) long. The gills on the cap underside are closely spaced and sometimes have a faint bluish tint. The spores are roughly spherical and have a network-like surface dotted with warts. Forms of the mushroom that develop a bluish band at the top of the stipe are sometimes referred to as variety acrior. Fruiting from summer to autumn, the

Calvatia cyathiformis, or purple-spored puffball, is a large saprobic species of Calvatia. This terrestrial puffball has purplish or purple-brown spores, which distinguish it from other large Agaricales. It is found in North America and Australia, mostly in prairie or grassland environments. It is reportedly edible when young.

Ceratocystis fimbriata is a fungus and a plant pathogen, attacking such diverse plants as the sweet potato (black rot) and the tapping panels of the Para rubber tree (moldy rot). It is a diverse species that attacks a wide variety of annual and perennial plants. There are several host-specialized strains, some of which, such as Ceratocystis platani that attacks plane trees, are now described as distinct species.

Loose smut of barley is caused by Ustilago nuda. It is a disease that can destroy a large proportion of a barley crop. Loose smut replaces grain heads with smut, or masses of spores which infect the open flowers of healthy plants and grow into the seed, without showing any symptoms. Seeds appear healthy and only when they reach maturity the following season is it clear that they were infected. Systemic fungicides are the major control method for loose smut.

Taphrina tosquinetii is a fungal plant pathogen that causes large blisters on both surfaces of the leaves of alder.

Ceratocystis is a genus of fungi in the family Ceratocystidaceae. Several species are important plant pathogens, causing diseases such as oak wilt and pineapple black rot.

Pseudocyphellaria is a genus of large, leafy lichens that are sometimes referred to as "specklebelly" lichens. The genus has a widespread distribution, especially in south temperate regions, and contains about 170 species. They resemble Lobaria, except that most species of Pseudocyphellaria have conspicuous pseudocyphellae on their lower surface, a characteristic that was once considered unique to this genus. Some species contain pulvinic acid-related pigments; in these species the soredia and pseudocyphellae can be bright yellow.

Asterothyrium is a genus of leaf-dwelling lichens in the family Gomphillaceae. These tiny lichens form small, star-shaped fruiting bodies on the surface of leaves in tropical and subtropical forests. They are most commonly found in humid, shaded environments where leaves remain moist and clean. The genus includes 19 recognised species distributed primarily throughout Central and South America.

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Trichosphaerella is a genus of lichenicolous fungi in the family Niessliaceae.

Teloschistes exilis is a species of corticolous (bark-dwelling), fruticose lichen in the family Teloschistaceae. It was first formally described in 1803 by French botanist André Michaux, as Physcia exilis. Finnish lichenologist Edvard Vainio transferred the taxon to the genus Teloschistes in 1890. The lichen is found in the Americas. Secondary metabolites (lichen products) that have been identified from the lichen include parietin and teloschistin. A form of the lichen described by Vilmos Kőfaragó-Gyelnik in 1938, Teloschistes exilis f. inaequalis Gyeln., has been proposed to represent a

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Chroodiscus is a genus of leaf-dwelling lichens in the family Graphidaceae. These lichens form thin, smooth crusts directly on living leaves and are characterized by distinctive star-shaped fruiting bodies that split into triangular segments, with centres ranging from grey to bright scarlet-red depending on their chemical composition. The genus is found throughout tropical regions worldwide, growing in the shaded understory of rainforests from lowland areas to mountain cloud forests, where they serve as sensitive indicators of undisturbed forest conditions.

Calenia is a genus of lichen-forming fungi within the family Gomphillaceae.

Aleurodiscus oakesii is a cluster of small, gray-white, irregular cup-shaped saprotrophic fungi that grows on decaying hardwood tree bark. This fungus may also be called hophornbeam discs, and it causes smooth patch disease. A. oakesii is found year round in North America, Europe, and Asia and is commonly found on oak trees.

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Stereum rameale is a plant pathogen infecting peach trees. It is often found in tiers on the dead wood of broad-leaved trees.

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Pterygiopsis is a genus of lichen-forming fungi in the family Lichinaceae. It contains 12 species. These lichens form thin, blackish crusts that cling tightly to rock surfaces, especially in damp seepage zones or along stream margins, and develop pinpoint brown disc-like fruiting bodies on their surface. The genus is typically found in semi-aquatic to fully aquatic habitats, where the lichens lack distinct outer protective layers but have a slightly gelatinous texture when wet.

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