William Louis Culberson

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. The main characteristics of the genus are the broad, rounded lobes of the greyish-green lichen body, and the presence of tiny pores in the outer surface (the cortex) that enable gas exchange. The lower surface of the lichen is brown

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. Species of Platismatia can be used to produce an orange-brown, yellow-brown, or brown dye, and at least one species was traditionally used to dye wool in Europe.

Platismatia glauca is a common and widespread species of corticolous (bark-dwelling), foliose lichen in the family Parmeliaceae. This distinctive lichen forms pale to dull grey patches measuring 1–15 centimetres across, with wavy, irregularly indented lobes that often have reproductive structures (apothecia) along their upturned margins. The species is known for its adaptability to varying nitrogen levels in the environment and contains several unique secondary metabolites that have been subjects of scientific research. In 2024, scientists completed a high-quality genome sequence of P. glauca

Cetrelia cetrarioides is a foliose lichen belonging to the family Parmeliaceae. It is native to Eurasia and Northern America. In Nepal, Cetrelia cetrarioides has been reported from 2,000 to 3,000 m elevation in a compilation of published records. It is part of the Cetrelia olivetorum species complex, a group of morphologically similar lichens now treated as four distinct species: C. cetrarioides, C. chicitae, C. monachorum, and C. olivetorum in the strict sense (sensu stricto.

Dimelaena thysanota (Mountain Lichen) is a crustose lichen in the family Physciaceae, found in the mountains of western North America and the Sonoran Desert.

Pseudevernia consocians is a species of lichen in the family Parmeliaceae. It is found in both North America and Central America. Some characteristic features of Pseudevernia consocians are its well-developed, numerous isidia, relatively narrow lobes, and the presence of the lichen product lecanoric acid.

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Dirinaria frostii is a species of lichen in the family Caliciaceae. It is commonly found in the southeastern United States and Sonora, Mexico. The species was first described by Tuckerman and later classified by Hale & Culberson.

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Asahinea is a genus of lichen-forming fungi in the family Parmeliaceae. The genus has a widespread circumpolar distribution, and contains four species. The species form medium to large, leaf-like, yellowish to brownish crusts on rocks and plant debris in open arctic and alpine habitats, and can be conspicuous in the field; A. chrysantha in particular produces bright yellow rosettes that stand out against the tundra. The genus is named in honour of the Japanese lichenologist Yasuhiko Asahina, who made foundational contributions to the understanding of lichen chemistry in the twentieth century.

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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. The lichen is distinguished from others in its genus by its narrow, linear lobes and primarily sexual reproduction.

Platismatia lacunosa is a species of corticolous (bark-dwelling), foliose lichen in the family Parmeliaceae. Known predominantly from western North America, it reproduces primarily through sexual means, which is uncommon in the genus. The species is distinguished by its ridged surface and large, folded apothecia (fruiting bodies).

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".

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Cetrelia olivetorum is a species of lichen-forming fungus belonging to the family Parmeliaceae. It has cosmopolitan distribution. In Nepal, Cetrelia olivetorum has been reported at 2,850 m elevation in a compilation of published records. Cetrelia olivetorum has also been treated as part of the C. olivetorum species complex. A 2024 review noted that this complex has been resolved into four chemically distinct species – C. cetrarioides, C. chicitae, C. monachorum, and C. olivetorum sensu stricto (in the strict sense) – and that these taxa have already been assessed separately in some national

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