Hypogymnia is a genus of foliose lichens in the family Parmeliaceae. They are commonly known as tube lichens, bone lichens, or pillow lichens. Most species lack rhizines that are otherwise common in members of the Parmeliaceae, and have swollen lobes that are usually hollow. Other common characteristics are relatively small spores and the presence of physodic acid and related lichen products. The lichens usually grow on the bark and wood of coniferous trees.
Calvitimela is a lichen genus in the family Tephromelataceae. Members of the family Tephromelataceae are crustose lichens with green photobionts and lecideine or lecanorine apothecia. The species in Calvitimela have lecideine apothecia, are saxicolous and are primarily found in alpine to arctic regions.
Tephromela is a genus of lichens in the family Tephromelataceae. There are about 25 species in this widespread genus.
Mycoblastus is a genus of crustose lichens in the family Tephromelataceae. Members of the genus are commonly called blood lichens.
In lichens, rhizines are multicellular root-like structures arising mainly from the lower surface. A lichen with rhizines is termed rhizinate, while a lichen lacking rhizines is termed erhizinate. Rhizines serve only to anchor the lichen to their substrate; they do not absorb nutrients, as do plant roots. Characteristics of the rhizines are used to identify lichens, for example, whether they are dense or sparse, uniformly distributed or clumped in specific areas, and straight or branched. Only foliose lichens may possess rhizines, not crustose or fruticose lichens, which lack a lower cortex.
The Tephromelataceae are a family of lichenized fungi in the order Lecanorales. The family was circumscribed by Austrian lichenologist Josef Hafellner in 1984. Tephromelataceae comprises the genera Tephromela, Calvitimela, Mycoblastus and Violella, which together constitute a well-supported monophyletic group.
Violella is a genus of two species of crustose lichens in the family Tephromelataceae. The genus is characterized by its brownish inner ascospore walls, brilliant violet hymenial pigment, and thallus chemistry. The type species, Violella fucata, was originally placed in genus Mycoblastus, but molecular phylogenetic analysis showed that this species as well as the Asian species V. wangii formed a phylogenetically distinct clade and warranted placement in a new genus. The generic name Violella, a diminutive form of the Latin viola, refers to the characteristic hymenium colour.
Bruce Pettit McCune is an American lichenologist, botanist, plant ecologist, and software developer for analysis of ecological data.
Hypogymnia congesta is a rare species of foliose lichen in the family Parmeliaceae. Found in China, it was formally described as a new species in 2003. The lichen 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. The lichen is chemically distinct, containing physodic acid and virensic acid; the latter substance is otherwise unknown from genus Hypogymnia.
Scytinium is a genus of lichen-forming fungi in the family Collemataceae. It has 49 species. These lichens are typically found on basic rocks, soil, and trees, occasionally in association with mosses. Despite the morphological and ecological diversity within Scytinium, its species share similar ascospore features, such as shape and septation, as well as a small to medium-sized thallus with at least a partial cortex.
Letharia columbiana is a common lichen in subalpine forests, particularly in the Pacific Northwest of the United States, and parts of Canada. It is in the family Parmeliaceae, and the genus Letharia. Its characteristics include a bright citron color, “brown-eyes”, and rounded, irregular branches. Though previously believed to lump together several lineages such as Letharia gracilis and others, there now exists more specific characteristics to identify the species. This lichen grows on the bark of conifers a couple inches tall. L. Columbiana’s cousin, Letharia vulpina (common name wolf lichen), has similar geographical distribution and morphological features, with the major difference being the “brown-eyes” of L. columbiana.
Biatora oxneri is a species of corticolous (bark-dwelling) lichen in the family Ramalinaceae. It is found in the Russian Far East and in South Korea.
Tephromela atra is a species of lichen in the family Tephromelataceae. It has a worldwide distribution.
Rostania is a genus of lichen-forming fungi in the family Collemataceae. These lichens are primarily found on tree bark, occasionally on wood, with one species known to inhabit soil. The genus is characterized morphologically by having minute thalli made of hyphal tissue without a separate cortex, and the more or less cuboid-shaped ascospores.
Tephromela lignicola is a species of lignicolous (wood-dwelling), crustose lichen in the family Tephromelataceae. It is found in the Falkland Islands, where it grows on fenceposts and similar timber.
Micarea viridileprosa is a species of crustose lichen in the family Pilocarpaceae that was first described in 2001. This crustose lichen is known to grow on bark, wood, and soil, and is distinguishable by its bright greenish soredia.
Caloplaca rinodinae-albae is a lichenicolous (lichen-dwelling) species of crustose lichen in the family Teloschistaceae, first described in 1987. This species is unique for its parasitic growth on the lichen Helmutiopsis alba. Characteristics of the lichen include its small, rounded, pale orange thalli and its ability to form larger patches through the confluence of individual thalli.
Cyclohymenia is a fungal genus in the family Lecideaceae. It contains the single species Cyclohymenia epilithica, a saxicolous (rock-dwelling) crustose lichen found in western North America and described as a new species in 2017 by Bruce McCune and Marc Curtis. The type specimen was collected by the first author from the North Ridge Trail to Marys Peak, at an elevation of 826 m (2,710 ft); it was found growing on shaded andesite rock. Although Cyclohymenia epilithica has been infrequently collected, the authors suggest that it is likely more prevalent than the limited number of collections indicates. To date, this species has been identified exclusively within the Coast Range and the western slope of the Cascade Range in Oregon and Washington. The genus name is derived from the Latin word cyclo, meaning 'circular', referring to the shape of the hymenium—the reproductive tissue layer. This hymenium is cylindrical in form and has a sterile center, distinguishing the genus with this unique structural characteristic.
Buellia bahiana is a crustose-type lichen species that frequently grows on the bark and wood of trees found in coastal and inland forest habitats. This lichen species exhibits a broad geographic distribution, being documented in various pantropical and subtropical regions around the world. Specific areas where Buellia bahiana has been recorded include parts of Australia, Africa, North America, Central America, South America, and several Pacific Island chains.
Mycoblastus sanguinarius, commonly known as the bloody heart lichen, is a widespread species of crustose lichen in the family Tephromelataceae. It is distinguished by its pale to dark grey thallus, which can appear very irregular and uneven, often with a thick, coarse, wart-like texture. The thallus may be continuous or somewhat cracked, with a prothallus that ranges from pale to dark grey. The apothecia are frequent, black, and become convex or hemispherical as they mature. These structures develop on a bright carmine-red thalline cushion, which is revealed when the thallus is damaged or worn. The lichen grows in temperate and montane forests across Asia, Europe, and North America. Usually found on tree bark, it has been recorded less frequently on decorticated wood and moss-covered rocks.
