John Alan Elix

Pleurosticta acetabulum is a species of foliose lichen in the family Parmeliaceae. It is common and widespread throughout Europe, where it grows on tree bark. It has also been recorded in Algeria.

Australiaena is a fungal genus in the family Caliciaceae. It is a monospecific genus, containing the single species Australiaena streimannii, a crustose lichen. It occurs in northern Australia and Papua New Guinea, where it grows on silica-rich rocks. The genus was proposed in 1997 and named to reflect both its Australasian distribution and its superficial resemblance to the genus Dimelaena. The lichen forms variable-coloured crusts, ranging from whitish to grey, ochre or brown, with margins that often show distinctive radiating folds. It is distinguished from similar genera by its

Ramboldia is a genus of lichen-forming fungi in the family Ramboldiaceae. The genus was established in 1994 to accommodate several Australasian lichens that form crusts on wood, bark, and rock surfaces, and it was named in honour of the German mycologist Gerhard Rambold. These lichens are characterised by their small, disc-shaped fruiting bodies and their chemical composition, which includes β-orcinol derivatives and sometimes anthraquinones, though they lack the distinctive crimson reaction found in the related genus Pyrrhospora. The genus contains about 40 species found worldwide, ranging

Hypotrachyna is a genus of lichenized fungi within the family Parmeliaceae. According to the Dictionary of the Fungi (10th edition, 2008), the widespread genus contains about 198 species. Hypotrachyna was circumscribed by American lichenologist Mason Ellsworth Hale Jr in 1974.

Myelochroa is a genus of foliose lichens in the family Parmeliaceae. They are commonly known as axil-bristle lichens. It was created in 1987 to contain species formerly placed in genus Parmelina that had a yellow-orange medulla due to the presence of secalonic acids. Characteristics of the genus include tightly attached thalli with narrow lobes, cilia on the axils, and a rhizinate black lower surface. Chemical characteristics are the production of zeorin and related triterpenoids in the medulla. Myelochroa contains about 30 species, most of which grow on bark. The genus has centres of

Canoparmelia is a genus of lichen-forming fungi in the family Parmeliaceae. The widespread genus contains about 35 species. Canoparmelia, a segregate of the parmelioid lichen genus Pseudoparmelia, was circumscribed by John Elix and Mason Hale in 1986.

Anzia entingiana is a species of corticolous (bark-dwelling) foliose lichen in the family Parmeliaceae. Found only in New Zealand, this lichen grows on tree bark in northern parts of the North Island, including kauri forests and coastal areas. It was described as a new species in 1997 by the Australian lichenologist John Elix in honour of the New Zealand lichenologist and photographer Brian Enting. The species forms small, pale grey patches with narrow lobes and produces tall, slender reproductive structures (isidia) that help distinguish it from related species.

Xanthoparmelia semiviridis, also known as resurrection lichen is a foliose lichen species in the family Parmeliaceae. Its common name comes from the reaction of a dry sample to moisture. In its dry state it appears like curled-up dry leaf litter on the ground, but after rainfall the lichen will quickly recover, unfurl and become darker in colour. It is found in semi-arid areas across southern Australia and the South Island of New Zealand. The species is in decline in New Zealand because of the loss of habitat resulting from the establishment of dairy farms and vineyards in former indigenous

Xanthoparmelia malawiensis is a species of saxicolous (rock-dwelling), foliose lichen in the family Parmeliaceae. Found in Malawi, it was formally described as a new species in 2002 by Australian lichenologist John Elix. The type specimen was collected in Nyika National Park at an altitude of 2,300 m (7,500 ft), where it was found growing on granite rocks. It is only known from the type locality. It contains usnic acid and stictic acid as major lichen products, and minor amounts of constictic acid, norstictic acid, cryptostictic acid, and lusitanic acid.

Xanthoparmelia alligatensis is a species of saxicolous (rock-dwelling), foliose lichen in the family Parmeliaceae, described by John Elix in 2006. The species is native to South Australia, specifically found in the Mount Remarkable National Park.

Vainionora americana is a species of crustose lichen in the family Lecanoraceae that is found in the United States. It was described as a species new to science in 2004 by the lichenologists Klaus Kalb, Tor Tønsberg, and John Alan Elix. The type was collected by Tønsberg from the southern Appalachian Mountains of North Carolina, where it was found growing on the bark of a maple tree. It was later recorded in Alabama. Vainionora americana has a crustose thallus that is greenish-gray in color, and soralia that are relatively large and convex. It produces atranorin and two xanthones as secondary

Relicina is a genus of foliose lichens belonging to the large family Parmeliaceae. Established as a genus in 1974 after initially being treated as a series within Parmelia, Relicina now encompasses about 40 species worldwide. These lichens typically grow as yellow-green, leaf-like patches with flat lobes fringed by short black hairs, attaching to their substrate by a swollen base. The genus is characterized chemically by the presence of usnic acid and various other lichen products, and is distinguished from related groups by details of ascospore structure and surface features.

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Ramboldia gowardiana is a species of corticolous (bark-dwelling), crustose lichen in the family Ramboldiaceae. First discovered in 2003 in Montana, United States, it typically appears as a grayish or greenish crust on tree bark, particularly on conifers like pines and firs. The lichen is characterised by its small, bright red to orange-red reproductive structures (apothecia) visible on its surface. R. gowardiana is found in dry, temperate forests from Alaska to California, often at elevations between 300 and 1,400 meters (about 980 to 4,600 feet). Initially classified in a different genus, it

Ramboldia blastidiata is a species of saxicolous (rock-dwelling) and crustose lichen in the family Lecanoraceae. Found in Australia, it was formally described as a new species in 2007 by lichenologists Gintaras Kantvilas and John Elix. The type specimen was collected by the first author from the western slopes of Strzelecki Peaks on Flinders Island (Tasmania) at an altitude of 150 m (490 ft); here, in dry sclerophyll forest, it was found growing on a granite boulder. The lichen forms pale grey-green, olive-green to dull olive-brown crust-like patches up to 30 cm (12 in) wide. The authors

Punctelia novozelandica is a species of foliose lichen in the family Parmeliaceae. Found in New Zealand, it was formally described as a new species in 1988 by John Alan Elix and Jen Johnston. The type specimen was collected in Port Hills, Banks Peninsula (Canterbury), where it was found growing on moist rock ledges in a remnant forest. The lichen grows on both rocks and tree bark in cool temperate podocarp forests on both islands of New Zealand. It is quite similar in appearance to Punctelia subflava, but is distinguished from that species by the black thallus undersurface (it is ivory to

Physcia verdonii is a species of foliose lichen in the family Physciaceae. It occurs in Australia and New Zealand.

Physcia rolandii is a species of foliose lichen in the family Physciaceae, first described in 2011. This species is named after the Swedish lichenologist Roland Moberg in recognition of his contributions to the study of the genus Physcia.

Physcia neonubila is a species of foliose lichen in the family Physciaceae. It was first described in 2008 from specimens collected in the Australian Capital Territory. This species is noted for its superficial resemblance to Physcia nubila but is distinguished by its narrower lobes, shiny tips, spotted surfaces, and unique chemical markers.

Physcia caesiopsis is a species of foliose lichen in the family Physciaceae. Found in Australia, it was identified as a species new to science in 2011. The lichen is noted for its superficial resemblance to the widespread Physcia caesia, differentiated by its broader lobes and unique chemosyndrome involving 20a-acetoxyhopane-6a,22-diol.

Physcia austrocaesia is a species of foliose lichen in the family Physciaceae. First described as a new species in 2011, it is found in Australia and New Zealand, where it grows on both on bark and on rocks. This species is closely related to the widespread Physcia caesia, but it can be distinguished by its broader lobes and the presence of aipolic acid, an uncommon secondary metabolite.

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Parmotrema circinatum is a species of foliose lichen in the family Parmeliaceae. It grows on twigs in open coastal woodland near Mackay in eastern Queensland, Australia. The lichen forms a greyish, leafy crust up to 8 cm across with distinctive coiled, densely branched lobes along its margins that lack the hair-like fringes found in related species. It is known only from its original collection site, roughly 100 metres from the shoreline.

Parmotrema austrocetratum is a species of lichen in the family Parmeliaceae. Found in Australia and New Zealand, it was described as new to science in 1988 by John Elix and Jen Johnston. The lichen, which can grow on either bark or rock, is light grey in colour, measures 6–12 cm (2.4–4.7 in) in diameter, and is loosely attached to its substrate. It is common on trees and rocks in coastal and hinterland areas along the subtropical and tropical east coast of Australia, as well as the North Island of New Zealand.

Parmotrema asperum is a species of saxicolous lichen in the family Parmeliaceae. Found in Brazil, it was described as new to science in 2008. The milky-grey thallus of the lichen is up to 11 centimetres (4.3 in) in diameter, consisting of irregularly branched lobes measuring 2.0–6.5 mm wide. The lichen is named for the coarse appearance of the thallus.

Parmotrema anchietanum is a species of saxicolous lichen in the family Parmeliaceae. Found in South America, it was described as new to science in 2008. The holotype was collected on the rocky shore of Anchieta Island in São Paulo; the lichen is named after the type locality. Its leathery, pale grey thallus measures up to 16 cm (6.3 in) in diameter, composed of irregularly branched lobes that are typically 1–3 mm wide. Secondary compounds present in the lichen include atranorin and chloratranorin in the cortex, and salazinic acid and consalazinic acid in the medulla.

Parmotrema albinatum is a species of foliose lichen in the family Parmeliaceae that is found in Hawaii. It was originally described in 2001 as Rimelia albinata. Later phylogenetic analysis demonstrated that the genus Rimelia was synonymous with Parmotrema, so this species was transferred to that genus. The lichen is characterized by the sorediate and short-lacinulate (containing glands) thallus with salazinic acid in the medulla and traces of lobaric acid. The upper surface of the thallus is whitish, which probably a result of the thickness of the thick upper cortex.

Parmotrema adspersum is a species of lichen in the family Parmeliaceae. It was originally described as a species of Parmelia by Edvard August Vainio in 1907. John Elix transferred it to Parmotrema in 2002, reasoning that its thick-walled ascospores (measuring 16–18 by 6–8 μm) are typical of that genus. Parmotrema adspersum is common in Thailand and the Philippines.