Cetrelia is a genus of leafy lichens in the large family Parmeliaceae. They are commonly known as sea-storm lichens, alluding to the wavy appearance of their lobes. The name of the genus, circumscribed in 1968 by the husband and wife lichenologists William and Chicita Culberson, alludes to the former placement of these species in the genera Cetraria and Parmelia.
Platismatia is genus of medium to large foliose lichens in the family Parmeliaceae. The genus is widespread and contains 11 species. They resemble many other genera of foliose lichens in the Parmeliaceae, particularly Parmotrema, Cetrelia, and Asahinea. Most species are found in forests on the trunks and branches of conifer trees, although some species grow on rocks.
Menegazzia terebrata is a species of foliose lichen found scattered across many continents, including North America, South America, Europe, Africa, and Asia.
Asahinea is a genus of lichenized fungi in the family Parmeliaceae. The genus has a widespread circumpolar distribution, and contains three species. The genus was circumscribed by the husband and wife lichenologist team William and Chicita F. Culberson in 1965, with Asahinea chrysantha as the type species. The genus name honours Japanese lichenologist Yasuhiko Asahina.
Vermilacinia cerebra is a fruticose lichen that grows on trees and shrubs in the fog regions along the Pacific Coast of North America from the Channel Islands and mainland California near Los Angeles to southern Baja California, also occurring in South America in the Antofagasta Province of northern Chile. The epithet is in reference to the apical swollen lobes that resemble the cerebrum of the brain.
Bryoria hengduanensis is a species of lichen of the genus Bryoria. It was described as new to science in 2003 by lichenologists Li-Song Wang and Hiroshi Harada. It is found in the Hengduan Mountains of southern China, where it grows on twigs and branches in coniferous forests at elevations of 3,000–4,000 metres (9,800–13,100 ft). The Hengduan Mountains is a region of high Bryoria biodiversity, as 24 species are known from this area.
Hypogymnia congesta is a rare species of foliose lichen in the family Parmeliaceae that is found in China. It was formally described as a new species by Bruce McCune and Chicita Culberson in 2003. The type specimen was collected near Wei Den village, behind Lou Ma Deng Mountain in Weixi County (Yunnan), at an elevation of 3,000 metres (9,800 ft). There it grows on the bark and wood of conifers and bamboo. Hypogymnia congesta has a brown to brownish-grey foliose thallus measuring up to 8 cm (3.1 in) long or broad, with a cartilage-like texture. Its ascospores measure 7–8 by 5.0–5.5 μm. The lichen is chemically distinct, containing virensic acid and physodic acid, but lacking physodalic acid. Virensic acid is otherwise unknown from the genus Hypogymnia.
Punctelia hypoleucites, commonly known as the southwestern speckled shield lichen, is a species of foliose (leafy) lichen in the family Parmeliaceae. First formally described by Finnish botanist William Nylander as a species of Parmelia, it was transferred to the genus Punctelia in 1982. The lichen is found in Africa, North America, and South America, where it grows on the bark of both hardwood and coniferous trees. Its greenish-grey thallus is covered with tiny white pseudocyphellae – minute holes in the thallus surface that facilitate gas exchange. Some macroscopic features that help distinguish this species from other related members of the genus include the presence and the structure of the apothecia, the absence of asexual surface propagules, and the light brown color of the thallus undersurface. Chemically, the presence of lecanoric acid in the medulla and atranorin in the cortex help distinguish it from lookalikes.
Punctelia graminicola is a species of foliose (leafy) lichen in the family Parmeliaceae. It grows on rocks, and, less frequently, on bark in North America, South America, and East Africa. It has a blue-grey thallus measuring up to about 15 cm (6 in), covered with tiny pores called pseudocyphellae. Sometimes the lichen forms small lobes that project out from the surface. Fruiting bodies are uncommon in this species; if present, they resemble small cups with a brown internal disc measuring 3–10 mm (0.1–0.4 in) in diameter. A lookalike species, Punctelia hypoleucites, is not readily distinguishable from Punctelia graminicola by appearance or habitat alone; these species can only be reliably differentiated by examining the length of their conidia.
Cetrelia chicitae is a species of foliose lichen in the family Parmeliaceae. It is found in eastern Asia, North America, and Europe, where it grows on mossy rocks and tree trunks.
Cetrelia monachorum is a species of foliose lichen in the family Parmeliaceae. It was first described scientifically in 1930 by Alexander Zahlbruckner as a species of Parmelia. Husband and wife lichenologists William and Chicita Culberson transferred it into the genus Cetrelia in 1977. It is found in Asia, Europe, and North America.
Lichen products, also known as lichen substances, are organic compounds produced by a lichen. Specifically, they are secondary metabolites. Lichen products are represented in several different chemical classes, including terpenoids, orcinol derivatives, chromones, xanthones, depsides, and depsidones. Over 800 lichen products of known chemical structure have been reported in the scientific literature, and most of these compound are exclusively found in lichens. Examples of lichen products include usnic acid, atranorin, lichexanthone, salazinic acid, and isolichenan, an α-glucan. Many lichen products have biological activity, and research into these effects is ongoing.
Platismatia formosana is a species of corticolous (bark-dwelling), foliose lichen in the family Parmeliaceae. Found in the mountains of Taiwan, it was first formally described as a species of Cetraria in 1933 by Alexander Zahlbruckner. William and Chicita Culberson transferred it to the genus Platismatia in 1968. The species epithet formosana refers to its distribution, as "Formosa" is name formerly used in Western literature to refer to Taiwan. It contains the lichen products atranorin, caperatic acid, and an unidentified yellow pigment.
Platismatia lacunosa is a species of corticolous (bark-dwelling), foliose lichen in the family Parmeliaceae. Known predominantly from western North America, it was first formally described in 1803 by Erik Acharius. William and Chicita Culberson transferred it to the genus Platismatia in 1968. P. lacunosa was recorded from the Commander Islands in the Russian Far East in 2021.
Platismatia interrupta is a species of foliose lichen in the family Parmeliaceae. Found in southern Russian Far East, and Japan, it was formally described as a new species in 1968 by William and Chicita Culberson. The species epithet interrupta refers to the indistinct and discontinuous reticulation of the upper thallus surface. The lichen of one of the most common foliose macrolichens in Japan, particularly at high elevations, where it grows on tree trunks and on boulders. The authors called it the "Far Eastern equivalent" of the common and widespread Platismatia glauca, which is absent in Asia.
Platismatia stenophylla is a species of corticolous (bark-dwelling), foliose lichen in the family Parmeliaceae. It is found in western North America, from Vancouver Island south to central California, usually close to a shore. It was first formally described as a species of Cetrelia in 1882 by American lichenologist Edward Tuckerman. William and Chicita Culberson transferred it to the genus Platismatia in 1968. The lichen is distinguished from others in its genus by its narrow, linear lobes. It contains caperatic acid and atranorin as lichen products.
Platismatia tuckermanii is a species of corticolous (bark-dwelling), foliose lichen in the family Parmeliaceae. It was first formally described as a species of Cetraria in 1843 by American botanist William Oakes. The species epithet honours lichenologist Edward Tuckerman, who collected the type specimen in Cambridge, Massachusetts, in 1838. William and Chicita Culberson transferred the taxon to the genus Platismatia in 1968. The lichen is found in Canada and the Southeastern United States. Although usually encountered growing on conifer bark, it is also known to grow on old wooden fenceposts. It contains caperatic acid and atranorin as lichen products.
Platismatia regenerans is a species of corticolous (bark-dwelling), foliose lichen in the family Parmeliaceae. Found in Borneo, it was formally described as a new species in 1968 by William and Chicita Culberson. The type specimen was collected by Mason Hale from the Kinabalu National Park in Sabah, at an elevation of 2,000 m (6,600 ft). The species epithet refers to the "regenerative lobulae" that occur on older parts of the thallus.
Platismatia herrei is a species of corticolous (bark-dwelling), foliose lichen in the family Parmeliaceae. It was first formally described as a species of Cetraria in 1968 by lichenologist Henry Imshaug. William and Chicita Culberson transferred it to the genus Platismatia in 1968. The lichen is found in western North America, ranging from southern Alaska to central California. It is distinguished from other members of its genus by the isidia that fringe the edges of its linear lobes; the Culbersons described it as "one of the most beautiful and intricately formed species in the genus".
Platismatia glauca is a common and widespread species of corticolous (bark-dwelling), foliose lichen in the family Parmeliaceae.
