Harvey Willson Harkness

Geopora is a genus of truffle-like fungi in the family Pyronemataceae, currently with 13 described species. The genus was circumscribed by mycologist Harvey Willson Harkness in 1885. Molecular phylogenetic reconstructions indicate that the cup-like apothecial Geopora should better be placed back in a separate genus, Sepultaria. Geopora would then only comprise Geopora cooperi and its close relatives.

Leucophleps is a genus of truffle-like fungi in the family Albatrellaceae. The genus, widespread in northern temperate regions, contains four species. Leucophleps was circumscribed by American mycologist Harvey Willson Harkness in 1899.

Geopora cooperi, commonly known as the pine truffle or the fuzzy truffle, is a species of fungus in the family Pyronemataceae. It has a fuzzy brown outer surface and an inner surface of whitish, convoluted folds of tissue. Widely distributed in the Northern Hemisphere, the species has been recorded from Eurasia and North America.

Dicranidion is a genus comprising 13 species of fungi in the family Orbiliaceae.

Puccinia evadens is a species of rust fungus that is found on Baccharis plants. According to Manual of the Rusts in United States and Canada (1934), Puccinia evadens is present throughout the Americas and the Caribbean.

Gautieria monticola is a species of hypogeal fungus in the family Gomphaceae. It was described as new to science in 1884 by American mycologist Harvey Willson Harkness. It grows up to 9 centimetres (3+1⁄2 in) across with no stem. It is pallid in youth then tannish to brownish, with similarly coloured spore chambers. In age, it smells like decaying onions or sour milk. It is nonpoisonous, but has a rubbery texture and may smell unpleasant.

Coniothyrium rosarum is a species of fungus in the family Coniothyriaceae.

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Exobasidium arctostaphyli is a species of parasitic fungus that induces witch's broom galls and leaf spots on manzanita trees.

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Tuber gibbosum, commonly known as the Oregon white truffle, is a species of truffle in the genus Tuber. It is found in the Pacific Northwest region of the United States, where it often grows with Douglas-fir.

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