Clavulina rugosa: The Ultimate Mushroom Guide
About The Clavulina rugosa Mushroom
Clavulina rugose is a species of coral fungus in the family Clavulinaceae. It is edible.
This small club fungus often grows solitary or in scattered groups among the moss beside woodland footpaths. The club is flattened in a cross-section and has very few irregularly shaped branches. The branch tips are blunt rather than having pointed tips as other white clubs, such as Clavaria fragilis (White Spindles) do.
Clavulina rugosa can be distinguished by its creamy to pale greyish or ochraceous coloration, and thick, often rugose, branches with blunt tips.
Other names: Wrinkled Coral Fungus.
Clavulina rugosa Identification
Presumably mycorrhizal; found under conifers and hardwoods; growing alone, gregariously, or in clusters; summer and fall (overwinter in warm climates); widely distributed in North America.
4-12 cm high; to 1.5 cm wide; unbranched or divided one to several times (often appearing antler-like).
Rugged; white, sometimes developing yellowish tints with age; yellow when dried for the herbarium; tips colored like the sides, blunt or occasionally "cristate" with several sharp points; when parasitized becoming dark gray to black from the base upward.
Not separate from the upper portion of the fruiting body.
Whitish; fairly tough.
Odor and Taste
Irons salts negative on branches.
Spores 9-14 x 8-12 µ; subglobose or broadly elliptical; smooth; with an apiculus. Basidia clavate; 40-85 x 6-9.5 µ; 2-sterigmate with long (6-9 µ), incurved sterigmata. Clamp connections present.
Clavulina cinerea is a grey, branching fungus that does not have the characteristic surface wrinkles of Clavulina rugosa.
Clavulina rugosa Taxonomy & Etymology
The Wrinkled Club was described in 1790 by French mycologist Jean Baptiste Francois (Pierre) Bulliard, who gave it the binomial scientific name Clavaria rugosa. Nearly a century later, in 1888, German mycologist Joseph Schrötter (1837 - 1894) transferred this species to the genus Clavulina, thereby establishing its currently accepted scientific name Clavulina rugosa.
The many synonyms of Clavulina rugosa include Clavaria rugosa var. alcyonaria Corner, Clavaria rugosa Bull., Clavaria grossa Pers., Clavaria canaliculata Fr., Ramaria rugosa (Bull.) Gray, Clavaria rugosa var. fuliginea Fr., Clavaria macrospora Britzelm., Clavulina rugosa var. alcyonaria Corner, Clavulina rugosa var. canaliculata (Fr.) Corner, Clavulina rugosa var. fuliginea (Fr.) Corner, and Clavulina rugosa var. macrospora (Britzelm.) Corner.
The specific epithet rugosa means wrinkled or rough.
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