Carl Nägeli

Coelastrum is a genus of green algae in the Scenedesmaceae family. It is a common component of the phytoplankton in freshwater habitats such as ponds, lakes, waterfalls, and temporary pools of water, particularly eutrophic ones. The genus has a more or less cosmopolitan distribution, although some species appear to have more restricted geographical distributions. The name comes from the Greek terms koilos, meaning hollow, and astron, meaning star.

Visit the page for more details.

Visit the page for more details.

Visit the page for more details.

Myriospora is a genus of crustose (crust-like), rock-dwelling lichens in the family Acarosporaceae. Its small, often mosaic-cracked thalli bear minute, blackish fruiting discs that each release dozens of colourless spores, a feature alluded to by the genus name—which means "countless spores". Following a 2024 transfer of Acarospora molybdina into the group, around thirteen species are accepted; the type species, M. smaragdula, is a common emerald-tinged "rock scale" on sun-exposed stone across the Holarctic realm. The genus was proposed in 1853 as a segregate of Acarospora but the original

Heppia is a genus of olive, brownish, grey, or blackish squamulose, crustose, or peltate like lichens. Heppia was once the type genus of the family Heppiaceae, but that family was folded into synonymy with Lichinaceae. In a multilocus phylogeny and re-classification of the class Lichinomycetes published in 2024, María Prieto, Mats Wedin and Matthias Schultz placed Heppia in the family Porocyphaceae as part of an emended, broader circumscription of that family; earlier treatments that folded Heppiaceae into Lichinaceae are therefore superseded by the new arrangement. Species of Heppia are

Rhizocarpon disporum, the single-spored map lichen, is a species of saxicolous (rock-dwelling), crustose lichen in the family Rhizocarpaceae. It has a circumpolar distribution and grows on sun-exposed siliceous rocks. Despite its species epithet, the lichen invariably contains only a single ascospore per ascus. A morphologically similar species, Rhizocarpon geminatum, has two spores per ascus; it is more widely distributed than R. disporum and tends to grow in moister habitats.

Visit the page for more details.

Visit the page for more details.

Visit the page for more details.

Visit the page for more details.

Visit the page for more details.

Visit the page for more details.

Visit the page for more details.