Page author: Wynn Tranfield
Rickenella fibula
orange moss agaric, orange nail fungus, orange mosscap

Distribution: It occurs in mossy forest habitats but also is a common urban mushroom, occurring in small to large groups in mossy lawns of homes, parks, and similar habitats.

Conservation Status: Not of concern

Identification Notes:

Rickenella fibula is a small, long-stiped, bright orange to yellowish fungus that occurs very widely on, or buried amongst, mosses. Microscopically, it is characterized by its conspicuous, large, long-necked cystidia on the gill edges and faces, stipe apex, and cap. Molecular analyses suggest that R. fibula is not closely related to most other gilled mushrooms, instead it falls within a heterogeneous group that includes mostly polypores and crust-fungi. R. swartzii (Fries) Kuyper is a similar, but less colorful, woodland species.

Accepted Name:
Rickenella fibula (Bull.) Raithelh.

Synonyms & Misapplications:
(none provided)
Additional Resources:

PNW Herbaria: Specimen records of Rickenella fibula in the Consortium of Pacific Northwest Herbaria database.

CalPhotos: Rickenella fibula photos.

3 photographs:
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