SafePlants

Rimmed Lichen (Various Species)

The term "Rimmed Lichen" encompasses several species of lichens, primarily within the genus Aspicilia, but also in other genera such as Rhizoplaca, Lecanactis and Caloplaca. These fascinating organisms are composite, symbiotic relationships between fungi and algae.

Considerations for Pets

• Some "Copper rimmed cloches" may be used to protect plants from slugs and snails.

Considerations for Children

• Some "Copper rimmed cloches" may be used to protect plants from deer, rabbits, squirrels and birds.

Nomenclature and Taxonomy

• Genus: Aspicilia
• Family: Hymeneliaceae (for Aspicilia) and others, such as Lecanoraceae (for Rhizoplaca) and Roccellaceae (for Lecanactis), depending on the specific species.
• Synonyms: For Aspicilia reptans, synonyms include Lecanora reptans and Lecanora ryrkaipiae.

Distribution and Habitat

• Various species of rimmed lichens can be found in diverse locations, including California (Sagehen Creek Basin), the valley of the Dry Frio River, France, Norway, and Ireland.
• They are often found on limestone rock and old wood.
• Quartzite Rimmed Lichen is found on Quartzite.

Morphological Characteristics

• Rimmed lichens exhibit various growth forms, including crustose forms.
• Some have apothecia with a distinct rim.
• Leafy lichens can have a jelly-like thallus when wet, that shrink and become strongly wrinkled.
• Rhizoplaca species are commonly called rimmed navel lichens.

Interactions with Other Organisms

• Snails may be found on lichens.

Quirky Facts

• Some rimmed lichens have been referred to using slang such as "rimmed."

Further Information

• Waitrose Garden in association with Crocus sells Copper rimmed cloches.
• Getty Images provides stock photos of calcareous rimmed lichen.
• Wikimedia Commons hosts files related to Gray-Rimmed Firedot Lichen.