Fungi named in 1833

Amanita phalloides ( AM-ə-NY-tə fə-LOY-deez), commonly known as the death cap, is a deadly poisonous basidiomycete fungus and mushroom, one of many in the genus Amanita. Originating in Europe but later introduced to other parts of the world since the late twentieth century, A. phalloides forms ectomycorrhizas with various broadleaved trees. In some cases, the death cap has been introduced to new regions with the cultivation of non-native species of oak, chestnut, and pine. The large fruiting bodies appear in summer and autumn; the caps are generally greenish in colour with a white stipe and

The European white egg (Amanita ovoidea), bearded amanita or European egg amidella, is a species of fungus of the genus Amanita in the family Amanitaceae. It is a large, white-colored fungus, often tinged with cream. Native to Europe, it is found on plains as well as mountains in the Mediterranean region. It is similar to some deadly poisonous species.

Uromyces is a genus of rust fungi in the family Pucciniaceae. The genus was described by Franz Unger in his 1833 work Die Exantheme der Pflanzen. They have a worldwide distribution but large occurrences happen in North America and Europe. The genus is the second-largest plant pathogenic rust genus, which is responsible for various plant affecting diseases, and it has major effects on both agricultural and non-agricultural plants. The genus is generally characterized by its unicellular teliospores (thick-walled resting spores) that help to characterize it and distinguish it from another

Ramularia is a genus of ascomycete fungi. Its species, which are anamorphs of the genus Mycosphaerella, are plant pathogens. Economically important host species include Narcissus, sugar beet, and barley. Ramularia species are hyphomycetes with simple morphology; other genera are frequently mistaken for Ramularia. As of 2024, almost 800 species are recognised in the genus Ramularia.

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Stemphylium is a genus of fungal plant pathogen.

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Hyphoderma is a genus of crust fungi in the family Hyphodermataceae. It was circumscribed by German botanist Karl Friedrich Wilhelm Wallroth in 1833.

Colpoma is a genus of fungi within the Rhytismataceae family. The genus contains 14 species.

Physoderma is a genus of chytrid fungi. Described by German botanist Karl Friedrich Wilhelm Wallroth in 1833, the genus contains some species that are parasitic on vascular plants, including P. alfalfae and P. maydis, causative agents of crown wart of alfalfa and brown spot of corn, respectively. Of the chytrid genera, Physoderma is the oldest. However, species were confused with the rust fungi, the genus Synchytrium, and the genus Protomyces of Ascomycota. Members of Physoderma are obligate parasites of pteridophytes and angiosperms. There are approximately 80 species within this genus

Myxarium nucleatum is a species of fungus in the family Hyaloriaceae. In the UK, it has been given the recommended English name of crystal brain. The fruit bodies are watery white, pustular or lobed, and gelatinous with small, white, mineral inclusions visible to the naked eye. It is a common, wood-rotting species in Europe, typically growing on dead attached or fallen branches of broadleaf trees. It is currently not clear whether collections from North America (where it is called granular jelly roll) and elsewhere represent the same species.

Phleogena is a fungal genus in the Phleogenaceae family. The genus is monotypic, containing the single species Phleogena faginea and is found mostly widespread in northern temperate areas, but is occasionally found in southern areas.

Xylogramma is a genus of fungi in the family Helotiaceae. The genus contains 18 species.

Stemphylium botryosum (family Pleosporaceae, order Pleosporales) is a species of fungi and plant pathogen infecting several hosts including alfalfa, red clover, peanut, soybean, lentils, beet, tomato, lettuce, hemp and carnations. It was originally found on Medicago sativa (Alfalfa) in Ontario, Canada and named as Pleospora tarda E.G Simmons but it was later found to be the anamorph of Stemphylium botryosum Wallr. 1833.

Seimatosporium is a fungus genus within the family Sporocadaceae. They are saprobic or pathogenic on plants, and are called 'pestalotioid fungi'. Seimatosporium physocarpi was found in Russia on the dead branches of Physocarpus opulifolius and Seimatosporium rosae was found on Rosa kalmiussica Chrshan. & Lasebna. Due to morphological and DNA sequence data several species within the genus has been transferred to other genera within the family.

Myxarium is a genus of fungi in the family Hyaloriaceae. Basidiocarps (fruit bodies) are gelatinous and effused or pustular. The genus is cosmopolitan. All species grow on dead wood or dead herbaceous stems.

Chrysosporium is a genus of hyaline hyphomycetes fungi in the family Onygenaceae. Chrysosporium colonies are moderately fast-growing, flat, white to tan to beige in color; they often have a powdery or granular surface texture. Hyaline, one-celled (ameroconidia) are produced directly on vegetative hyphae by non-specialized conidiogenous cells. Conidia are typically pyriform to clavate with truncate bases (6 to 7 by 3.5 to 4 um) and are formed either intercalary (arthroconidia), laterally (often on pedicels), or terminally.

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Pyrenochium is a genus of fungi in the class Dothideomycetes. The relationship of this taxon to other taxa within the class is unknown (incertae sedis). Also, the placement of this genus within the Dothideomycetes is uncertain. A monotypic genus, it contains the single species Pyrenochium pini.

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Trentepohlia jolithus (basionym: Byssus jolithus) is an alga species in the genus Trentepohlia. Despite being a member of the group of green algae (Chlorophyta), it is usually colored bright orange or red due to the presence of carotenoid pigments. Trentepohlia jolithus occurs in cool, humid regions. It mostly grows on rocks, boulders and concrete walls, but it has also been reported growing on wood. It often forms large orange mats, particularly in forests in northern Europe. In Germany, it is called "Veilchenstein" or "Veilchenmoos" due to the smell of violet which emanates from the alga

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