Jack Rodney Laundon

Chrysothrix chlorina, the sulphur dust lichen, is a species of leprose (powdery) crustose lichen in the family Chrysotrichaceae. Originally described scientifically by the Swedish lichenologist Erik Acharius over 200 years ago, it has been shuffled to many different genera in its taxonomic history before finally being transferred to Chrysothrix in 1981. The lichen has a circumboreal distribution, meaning it occurs in northern boreal regions across the planet. It is typically saxicolous (rock-dwelling), particularly on the underside of rock overhangs, but has in rare instances been recorded

Chrysothrix candelaris, commonly known as the mustard powder lichen or gold dust lichen, is a species of leprose (powdery) lichen in the family Chrysothricaceae. It typically grows on tree bark, although it has also been recorded growing on rock. It does not show ascocarps or other reproductive structures, belonging to the group commonly known as the 'Fungi or lichens imperfecti' in the UK.

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Haematomma ochroleucum, also known as yellow bloodstain lichen, is a species of crustose lichenized fungus. First described in 1771 by Noël Martin Joseph de Necker, it has no subspecies, but two named varieties: H. o. var. ochroleucum and H. o. var. porphyrium.

Dermatocarpon luridum is a species of lichen belonging to the family Verrucariaceae.

Cladonia peziziformis or the turban cup lichen is a species of cup lichen in the family Cladoniaceae.

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Anaptychia runcinata is a species of fungus belonging to the family Physciaceae. It is native to Europe and Northern America.

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Pertusaria flavida is a species of corticolous (bark-dwelling) crustose lichen in the family Pertusariaceae. First described in 1815, it is characterized by its distinctive pale to bright sulphur yellow or yellow-green-grey thallus with a cracked, warted surface. The lichen reproduces mainly through small spherical or cylindrical outgrowths called isidia, which occasionally break down into powdery structures, while fruiting bodies are very rare. It contains thiophaninic acid, giving it an orange fluorescence under ultraviolet light. Widespread throughout southern and eastern Britain, parts of

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Lepraria cupressicola is a species of leprose lichen in the family Stereocaulaceae. It occurs in east and southeast Asia, where it grows on rocks, soil and bark in shaded, damp locations.

Lecanora jamesii is a species of lichen-forming fungus in the family Lecanoraceae. It is a grey, crust-forming lichen distinguished by its scattered, pale citron-yellow powdery patches (soralia) and an unusual chemical compound, 2-O-methylsulphurellin. Fruiting bodies (apothecia) are rarely produced. The species grows on the bark of deciduous trees in humid habitats, and has been recorded from western Europe, the Pacific coast of North America, and parts of western Asia.

Xylographa vitiligo is a species of wood- and bark-dwelling lichen in the family Xylographaceae. This European lichen typically grows on the wood of fallen trees and stumps, occasionally colonising the bark of coniferous species, and is found primarily in northern latitudes and mountainous regions. The species has a complex taxonomic history due to confusion in the original specimens, which required later designation of a lectotype to clarify the name's application.

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Chrysothrix chrysophthalma is a species of leprose lichen in the family Chrysotrichaceae. It occurs in Europe, where it grows on decaying wood and the bark of coniferous and deciduous trees in well-lit habitats.

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Chrysothrix pavonii is a species of lichen-forming fungi in the family Chrysotrichaceae. It is endemic to Chile, and one of the four species in the genus that inhabit this country alongside Chrysothrix candelaris, Chrysothrix chilensis and Chrysothrix granulosa. Its habitat is near the coast and it always grows on the branches of spiny shrubs or on spines of cacti.

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