SafePlants

Spike Lichen: A Closer Look

The term "Spike Lichen" is commonly used to refer to several species within the Calicium genus. This page provides a general overview of what is known about these fascinating organisms.

Scientific Classification

• Kingdom: Fungi (Lichens are a symbiotic association between fungi and algae or cyanobacteria, but by convention, they are classified within the fungal kingdom)
• Family: Caliciaceae (for some species, like Calicium salicinum)
• Genus: Calicium

Nomenclature and Synonyms

• Common Name: Spike Lichen
• Synonyms: Calicium hemisphaericum (for Adequate Spike Lichen)

Considerations for Pets

• Some mentions of "spikes" on the lichen's structure exist and should be considered in species identification if pets are present.

Considerations for Children

• Some mentions of "spikes" on the lichen's structure exist and should be considered in species identification if children are present.

Distribution and Habitat

Spike lichens have been reported in various locations, including:

• The Balkan Peninsula (where Calicium abietinum is considered rare)
• Chiricahua National Monument
• Landgoed Staverden
• Pine forests, where Calicium parvum may be found

Morphological Characteristics

• Some species are described as being gray with tiny spikes.
• Growth Habit: Lichenous

Interactions with Other Organisms

• Firespike flowers attract many species of butterflies, though this refers to a separate plant and not the Spike Lichen itself.
• Common Spike-Thorn (Gymnosporia buxifolia) is noted as being associated with *Usnea* lichen.

Further Information

For more in-depth information, you can consult resources such as:

• Catalogue of Life: 2012 Annual Checklist
• Lichen Flora of the Greater Sonoran Desert Region
• USDA resources