Adolf Hugo Magnusson

Acarospora contigua is a species of saxicolous (rock-dwelling), crustose lichen in the family Acarosporaceae. It was formally described as a new species in 1929 by Swedish lichenologist Adolf Hugo Magnusson. The dark yellow thallus has a continuous smooth crust comprising areoles that are 1–2.5 mm in diameter. In North America, it is known as the gold cobblestone lichen. The lichen was reported from the Eastern Ghats India in 2021, where it occurs in tropical conditions at elevations between 500 and 1,000 m (1,600 and 3,300 ft).

Umbilicaria nylanderiana is a species of foliose lichen in the family Umbilicariaceae. It typically appears as a single, rigid disc attached to rock surfaces. First described in 1927, it can grow up to 6 cm (2.4 in) across and is characterised by its dark brown to grey upper surface with dense, rounded ridges, and a black lower surface. The species is found worldwide on boulders and cliffs in alpine regions, including Europe, North and South America, and parts of maritime Antarctica. It can be distinguished from similar-looking species by its production of specialised reproductive structures

Lecanora cinereofusca is a species of corticolous (bark-dwelling) crustose lichen in the family Lecanoraceae.

Candelariella coralliza is a species of fungus belonging to the family Candelariaceae. In Nepal, Candelariella coralliza has been reported from 3,800 to 5,000 m elevation in a compilation of published records; this reported range extends above the tree line used in the study.

Acarospora socialis (bright cobblestone lichen) is a usually bright yellow areolate to squamulose crustose lichen in the family Acarosporaceae that grows up to 10 cm wide, mostly on rock in western North America. It is among the most common lichens in the deserts of Arizona and southern California. It grows on sandstone, intrusive and extrusive igneous rock such as granitics, in all kinds of exposures to sunlight, including vertical rock walls. It is found in North America, including areas of the Mojave Desert and Sonoran Desert region, to Baja California Sur. It is the most common yellow

Acarospora obnubila ("cloudy cobblestone lichen") is a dull brown squamulose areolate crustose lichen that may grow up to 4 mm in diameter or with squamules scattered among other lichens. They are common in Arizona, southern California, and Baja California. They grow by themselves on acidic rock in full sunlight. Squamules measure up to 2 mm in diameter and are round to irregular, with have a stipe. They may also grow on members of the genus Aspicilia (lichenicolous). Competition for space with other lichens stimulates longer stipes to develop, whereby the squamules may overlay other lichens.

Stereocaulon saxatile is a species of snow lichen belonging to the family Stereocaulaceae.

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Acarospora elevata, the mountain cobblestone lichen, is a shiny dark reddish brown to dark brown verrucose to aereolate crustose lichen that grows up to 3 cm (1.2 in) wide on granite in central and southern California to Baja California, and high elevations in the Rocky Mountains. It is usually only found above 1,400 metres (4,600 ft) because it is eaten by red mites at lower elevations. In the Californias, it is mostly found at high elevations (hence "elevata"), but sometimes in coastal locations where it is less glossy. It grows in full sun, mostly on hard granite, but sometimes other

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Stereocaulon glareosum is a species of snow lichen belonging to the family Stereocaulaceae.

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