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jelly lichen
Scientific Name: Collema limosum
Family: Collemataceae
Category: Lichen
Growth: Lichenous
Duration:
Other Names:
River Jelly Lichen (Collema dichotomum)
The River Jelly Lichen, scientifically known as Collema dichotomum, is a fascinating lichen that resembles seaweed more than a typical plant. It's also referred to simply as Jelly Lichen.
Considerations for Pets
- This aquatic lichen grows on submerged rocks and boulders.
- The thallus (lichen body) forms flattened or erect, bright to dark green rosettes.
Taxonomy and Nomenclature
- Scientific Name: Collema dichotomum (With.) Coppins & Laundon
- Common Name: River Jelly Lichen
- Family: Collemataceae
- Order: Lecanorales
- Synonyms: Mentions Collema ohioense as a synonym for COLLEMA CONGLOMERATUM (Dotted Jelly Lichen).
Distribution and Habitat
- This aquatic lichen thrives on submerged rocks and boulders in fast-flowing rivers.
- It has been found in the upper reaches of rivers, including those in Northumberland.
- It is known only from one site.
Morphological Characteristics
- Thallus is foliose, black, and gelatinous when wet.
- The lobes are broadly rounded.
Quirky Facts
- River Jelly Lichen looks more like a seaweed than a lichen.
Additional Information
- The Encyclopedia of Life and ARKive offer further information and images.