Paul Berthet

Oidium mangiferae is a plant pathogen that infects mango trees causing powdery mildew. Powdery mildew of mango is an Ascomycete pathogen of the Erysiphales family that was initially described by Berthet in 1914, using samples collected from Brazil. O. mangiferae is found in all areas where mangoes have been raised long term, but is particularly widespread in India where both the host and the pathogen are native. Currently no teleomorph stage has been identified, but due to certain morphological characteristics it has been suggested that O. mangiferae belongs in the Erysiphe polygony group.

Urnula helvelloides is a species of fungus in the family Sarcosomataceae, first described in 1973 from southern France. The fungus forms distinctive cup-shaped fruit bodies measuring 2–2.5 centimetres in diameter, with a dark brown to black exterior and a black spore-bearing surface with a subtle reddish tinge, mounted on a slender stalk 3–5 centimetres long. It grows on dead yew branches partially buried in humus within mixed beech-yew-oak forests, fruiting between January and April at elevations of 650–700 metres.

Arpinia is a genus of fungi in the family Pyronemataceae.

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Helvella semiobruta is a species of mushroom-forming fungus in the family Helvellaceae, formally described in 1976. The fungus produces stalked, cap-shaped fruit bodies with lobes that start greyish white and darken to black with age, supported by a hollow stalk featuring three to five blunt longitudinal ribs. It grows in mycorrhizal association with rock rose shrubs (particularly Cistus albidus) and is primarily found in Mediterranean climates of southern Europe, though it has been recorded as far north as Sweden. The species typically fruits from January to March at elevations of 500–700

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Hypotarzetta is a genus of fungi in the family Pyronemataceae. It is monotypic, containing the single species Hypotarzetta insignis.

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Urnula helvelloides is a species of fungus in the family Sarcosomataceae, first described in 1973 from southern France. The fungus forms distinctive cup-shaped fruit bodies measuring 2–2.5 centimetres in diameter, with a dark brown to black exterior and a black spore-bearing surface with a subtle reddish tinge, mounted on a slender stalk 3–5 centimetres long. It grows on dead yew branches partially buried in humus within mixed beech-yew-oak forests, fruiting between January and April at elevations of 650–700 metres.

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