Isidium
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An isidium is a tiny, wart- or finger-like outgrowth on the thallus surface of certain lichen species. It is one of two principal types of vegetative reproductive structures in lichens, the other bein
A herbarium specimen of the lichen Leptogium cyanescens, magnified 40X, with lobule-shaped isidia
Closeup of the pustulate isidia that are characteristic of Flavoparmelia baltimorensis; scale bar = 1 mm
The gelatinous lichen Collema subflaccidum has prominent globular isidia.
Isidia that occur on Usnea, such as these on the branch S. ceratina, are sometimes referred to as isidomorphs.
Enchylium
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Enchylium is a genus of lichen-forming fungi in the family Collemataceae. The genus was originally established as a section of the related genus Collema in 1810, but molecular studies have since confi
