SafePlants

Cladonia (Cup Lichen)

Cladonia, commonly called cup lichen, is a fascinating genus of moss-like lichens belonging to the family Cladoniaceae. Known for their distinctive cup-shaped structures, these lichens play a significant role in various ecosystems.

Considerations for Pets

• Some Cladonia species have upright fruiting stalks, which could be tempting for pets to investigate.

Considerations for Children

• The small, cup-like structures, sometimes referred to as "pixie cups," could be attractive to young children.

Taxonomy and Nomenclature

• Scientific Name: Cladonia
• Common Name: Cup lichen, Pixie cup lichen (for some species like Cladonia asahinae and Cladonia pyxidata)
• Family: Cladoniaceae

Distribution and Habitat

• Cladonia species are found across various environments, including boreal forests.
• They often grow on the forest floor, typically on logs, at the base of trees, or on rock outcrops.
• Specific species like Cladonia chlorophaea are common on rotting stumps in wet lowland areas.
• Some species thrive in exposed subalpine sites, growing on poor soils and fallen logs.

Morphological Characteristics

• Cladonia lichens often feature cup-like structures (podetia).
• The podetia can vary in shape, from funnel-shaped to having upright fruiting stalks.
• Some species, like those in the Cladonia pyxidata group, have thallus lobes.
• The exterior of the podetia may be covered with corticate granules.
• Species like Cladonia fimbriata grow among mosses.

Ecological Role

• Cladonia lichens serve as a primary food source for reindeer and caribou.

Quirky Facts

• The shape of some Cladonia lichens has been likened to "Shrek's Ears" or miniature golf tees.
• Historically, some cultures have used Cladonia boiled with milk or syrup as a remedy for whooping cough and chest ailments.