Thomas Hawkes Nash III

Botanist and lichenologist (born 1945 ).

Thomas Hawkes Nash III (born November 13, 1945) is an American lichenologist. His research is about the biology and ecology of lichens, and the effects of air pollution on plants and lichens. He is known as an authority on the family Parmeliaceae. During his long career at the Arizona State University, he helped develop the lichen herbarium into a world-class collection with over 100,000 specimens representing more than 5000 species. In 2010, the year of his retirement, he was awarded the Acharius Medal for lifetime achievements in lichenology, and the following year had a Festschrift publishe

Abbreviations: T.H.Nash
Occupations: lichenologist, botanist
Citizenships: United States
Languages: English
Dates: 1945-00-00T00:00:00Z
Birth place: Arlington County
Direct attributions: 0 plants, 127 fungi
Authorship mentions: 0 plants, 143 fungi

127 fungi attributed, 16 fungi contributed to143 fungi:

Umbilicaria americana (Frosted Rock Tripe) Poelt & T.H. Nash 1993
fungi species in the umbilicariaceae family
Umbilicaria americana, commonly known as frosted rock tripe, is a foliose lichen of rock faces.
Niebla isidiaescens Bowler, J.E. Marsh, T.H. Nash & Riefner 1994
fungi species in the ramalinaceae family
Niebla isidiaescens is a species of fruticose lichen in the family Ramalinaceae. It was originally described in 1994 from specimens collected in Baja California. The lichen grows on rocky outcrops in open maritime scrub habitats.
Omphalora arizonica (Arizona Omphalora) (Tuck. ex Willey) T.H. Nash & Hafellner 1990
fungi species in the parmeliaceae family
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Hypotrachyna anzeana Elix, T.H. Nash & Sipman 2009
fungi species in the parmeliaceae family
Hypotrachyna anzeana is a species of foliose lichen in the family Parmeliaceae. It occurs in the Andes of Colombia and Bolivia, where it grows over moss cushions on acidic rocks at an elevation of 3,500–3,900 m (11,500–12,800 ft). The specific epithet honours the collector of the type specimen, the environmental biologist Rafael Anze Martin.
Hypotrachyna ahtiana Elix, T.H. Nash & Sipman 2009
fungi species in the parmeliaceae family
Hypotrachyna ahtiana is a species of foliose lichen in the family Parmeliaceae. It is known only from the type locality in Venezuela, where it was collected in the Guyana Shield at an elevation of 1,950 m (6,400 ft). It is named to honour Finnish lichenologist Teuvo Ahti.
Xylographa pruinodisca B.D. Ryan & T.H. Nash 2004
fungi species in the xylographaceae family
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Xanthoparmelia treurensis Hale, T.H. Nash & Elix 1986
fungi species in the parmeliaceae family
Xanthoparmelia treurensis is a species of saxicolous (rock-dwelling), foliose lichen in the family Parmeliaceae. Found in Southern Africa, it was formally described as a new species in 1986 by the lichenologists Mason Hale, Thomas Hawkes Nash III, and John Elix. The type specimen was collected by Hale from Pilgrims Rest (Transvaal) at an elevation of 1,200 m (3,900 ft), where it was found growing on sandstone in a coppice area. The species epithet treurensis refers to the Treur River, which is in the type locality. The lichen thallus is dark yellowish green and measures 6–8 cm (2.4–3.1 in)
Xanthoparmelia transvaalensis Hale, T.H. Nash & Elix 1986
fungi species in the parmeliaceae family
Xanthoparmelia transvaalensis is a species of saxicolous (rock-dwelling), foliose lichen in the family Parmeliaceae. Found in Southern Africa, it was formally described as a new species in 1986 by the lichenologists Mason Hale, Thomas Hawkes Nash III, and John Elix. The type specimen was collected from the summit of Long Tom Pass at an elevation of 2,140 m (7,020 ft), where it was found growing in a pasture on a sandstone outcrop. The lichen thallus is dark yellowish green and measures 6–8 cm (2.4–3.1 in) broad, comprising lobes that are 1–2 mm. The thallus surface is densely covered with
Xanthoparmelia terricola Hale, T.H. Nash & Elix 1986
fungi species in the parmeliaceae family
Xanthoparmelia terricola is a species of terricolous (ground-dwelling), foliose lichen in the family Parmeliaceae. Found in Southern Africa, it was formally described as a new species in 1986 by the American lichenologist Mason Hale. The type specimen was collected at the top of the Brandwagsrot in Golden Gate Highlands National Park at an elevation of 1,900 m (6,200 ft), where it was found growing on pebbles and soil in areas of flat sandstone exposures. The thallus of X. terricola, which grows tightly to loosely on its substrate, is yellowish green but darkens towards the center and
Xanthoparmelia maricopensis (Maricopa Rock-shield) T.H. Nash & Elix 1986
fungi species in the parmeliaceae family
Xanthoparmelia maricopensis, the Maricopa rock-shield, is a 2–6 cm (0.8–2.4 in) wide, yellow-green foliose lichen in the Parmeliaceae family. It grows on igneous rock in southwestern North American deserts.
Xanthoparmelia colensoica T.H. Nash, Elix & J. Johnst. 1988
fungi species in the parmeliaceae family
Xanthoparmelia colensoica is a species of lichen in the family Parmeliaceae. The species was first described in 1988 from specimens collected on acidic rock at Bainskloof Pass in South Africa's Cape Province. It forms small, firmly attached patches 1 to 2 centimetres across that are yellow-green when young but darken to greyish black with age. The lichen is distinguished by its secondary chemistry, particularly the presence of colensoic acid together with several related compounds.
Xanthoparmelia bainskloofensis Elix & T.H. Nash 2002
fungi species in the parmeliaceae family
Xanthoparmelia bainskloofensis is a species of saxicolous (rock-dwelling), foliose lichen in the family Parmeliaceae. It was formally described as a new species in 2002 by lichenologists John Elix and Thomas Hawkes Nash III. The type specimen was collected by Nash from Bainskloof Pass (Cape Province, South Africa) at an altitude of 600 m (2,000 ft), where it was found growing on acidic rock. The species epithet refers to the type locality, the only place the lichen is known to occur. It contains usnic acid as a major lichen product, and minor amounts of echinocarpic acid, conechinocarpic
Ramalina sonorensis Kashiw. & T.H. Nash 1994
fungi species in the ramalinaceae family
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Ramalina quercicola Kashiw. & T.H. Nash 2004
fungi species in the ramalinaceae family
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Ramalina psoromica Kashiw. & T.H. Nash 2002
fungi species in the ramalinaceae family
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Ramalina chihuahuana Kashiw. & T.H. Nash 2002
fungi species in the ramalinaceae family
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Ramalina ahtii Kashiw. & T.H. Nash 1994
fungi species in the ramalinaceae family
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Pertusaria neolecanina Lumbsch & T.H. Nash 1999
fungi species in the pertusariaceae family
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Pertusaria brattiae Lumbsch & T.H. Nash 1999
fungi species in the pertusariaceae family
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Peltula sonorensis Büdel & T.H. Nash 1993
fungi species in the peltulaceae family
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Omphalora T.H. Nash & Hafellner 1990
fungi genus in the parmeliaceae family
Omphalora is a fungal genus in the family Parmeliaceae. The genus is monotypic, containing the single species Omphalora arizonica, a foliose lichen found in North America.
Niebla tuberculata Riefner, Bowler, J.E. Marsh & T.H. Nash 1995
fungi species in the ramalinaceae family
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Niebla polymorpha Bowler, J.E. Marsh, T.H. Nash & Riefner 1994
fungi species in the ramalinaceae family
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Niebla cedrosensis J.E. Marsh & T.H. Nash 1994
fungi species in the ramalinaceae family
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Lichinella robustoides Henssen, Büdel & T.H. Nash 1986
fungi species in the lichinaceae family
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Lichinella intermedia Henssen, Büdel & T.H. Nash 1986
fungi species in the lichinaceae family
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Lichinella flexa Henssen, Büdel & T.H. Nash 1986
fungi species in the lichinaceae family
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Lecanora sonorae B.D. Ryan & T.H. Nash 1989
fungi species in the lecanoraceae family
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Lecanora ryanii T.H. Nash & Lumbsch 2003
fungi species in the lecanoraceae family
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Lecanora pallidochlorina T.H. Nash, B.D. Ryan & Lumbsch 2003
fungi species in the lecanoraceae family
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