Calicium

Calicium
Calicium viride
Scientific classification
Domain: Eukaryota
Kingdom: Fungi
Division: Ascomycota
Class: Lecanoromycetes
Order: Caliciales
Family: Caliciaceae
Genus: Calicium
Pers. (1794)
Type species
Calicium viride
Pers. (1794)

Calicium is a genus of leprose lichens.:234 It is in the family Caliciaceae, and has 40 species.

The sexual reproduction structures are a mass of loose ascospores that are enclosed by a cup shaped exciple sitting on top of a tiny stalk, having the appearance of a dressmaker's pin (called a mazaedium), hence the common name pin lichen.:15 They are also commonly called stubble lichens.:234

They have been used as indicator species for old growth redwood forests.:234

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