SafePlants

Cladonia: The Cup Lichen

Cladonia, commonly known as cup lichen or pixie cup lichen, is a fascinating genus of moss-like lichens belonging to the family Cladoniaceae.

Considerations for Pets and Children

• Some Cladonia species, like Cladonia pyxidata, feature cup-like structures.
• The text mentions that some *Cladonia* species may be found growing on rotting wood, moss, or humus, which could be accessible to pets or children exploring outdoor environments.

Taxonomy and Nomenclature

• Scientific Name: Cladonia (genus)
• Family: Cladoniaceae
• Common Names: Cup lichen, Pixie cup lichen
• Cladonia asahinae is specifically mentioned as a species within this genus.

Distribution and Habitat

• Cladonia species are found across the boreal forest.
• They often grow on moss, rotting stumps in wet lowlands, acidic soil, fallen logs, or at the base of trees.
• Specific locations mentioned include the Olympic Peninsula, Eagle Creek Trail (Columbia River), and the Pocono Mountains.

Morphological Characteristics and Growth Habits

• Cup lichens are often described as moss-like in appearance.
• They can resemble miniature golf tees (podetia).
• The "pixie cup" form features a tiny cup (around 1/2 inch high) on a stalk.
• Some species have upright fruiting stalks.
• Variations include funnel-shaped podetia and cups with round-toothed, curled edges.

Ecological Role

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

Traditional Uses

• Boiled with milk or syrup, this lichen has been used as a remedy for whooping cough and chest ailments.

Quirky Facts

• Some describe the appearance of *Cladonia* as resembling "Shrek's Ears" or miniature, battered golf tees.
• Pixie cup lichens are sometimes associated with magical imagery, like adding a unicorn figurine to a terrarium.

Interactions with Other Organisms

• Lichens are a symbiotic relationship between algae and fungus.
• Cladonia species can be found growing within lichen colonies of other species.