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Helocarpon erraticum
Helocarpon erraticum is a species of crustose lichen in the family Ectolechiaceae. It grows mainly on siliceous rock and is a widely distributed species.
From the article Helocarpon erraticum on Wikipedia (CC BY-SA), quoted section by section
Description
In the 2026 revision, H. erraticum was described as forming a rather thick, olive-green to grey-green crust that cracks into small angular patches (rimose–areolate). Its fruiting bodies (apothecia) are numerous, very small (to about 0.4 mm across), and dark brown to blackish. The spores are narrow and colourless, and are usually simple but may have a single septum (1-septate).
Range & habitat
Helocarpon erraticum is mostly saxicolous and occurs chiefly on siliceous rocks, where it can behave as an early coloniser of exposed mineral surfaces. The 2026 revision characterised it as widely distributed.
== References ==
Wikipedia: “Habitat and distribution”
Where it lives
Recorded sightings
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geo-referenced records in GBIF, from museums, herbaria and field observers.
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In the stacks
Searching the stacks…
Every page naming Helocarpon erraticum in the Biodiversity Heritage Library →
This page is assembled live from iNaturalist, GBIF, Wikipedia, the Source Library and the Internet Archive. It is not yet part of the hand-edited codex. iNaturalist taxon 1669159.