Common Bird's Nest Fungi, Crucibulum laeve, (syn. Crucibulum vulgare)

Bird's Nest Fungi are cuplike receptacles, measuring .1-.5 inches in diameter which contain peridioles that resemble eggs in a basket. The "eggs" are attached by a thread to the cup. Inside the peridiole spores lay dormant and are released when the covering splits open. Bird's nest fungi grow on twigs, decaying wood, straw or sawdust.

After searching for a solution to this curious problem, "Common Bird's Nest," Crucibulum vulgare is a synonym for Crucibulum laeve according to the Global Biodiversity Information Facility, and according to my preferred federal taxonomy database,, Crucibulum as a genus, is listed under the Animal Kingdom (see this link). On the USDA database, Crucibulum is yet listed as a classification of fungi.

Taxonomic Hierarchy
Crucibulum vulgare, Common Bird's Nest
The common bird’s nest cup is 0.1-.3 inches in height with a rounded top. As the cup matures a hairy brown membrane breaks and exposes a white membrane beneath. This also ruptures and disappears revealing spore-filled eggs.
Kingdom Fungi
Phylum Basidiomycota
Class Agaricomycetes
Order Agaricales
Family Agaricaceae
Genus Crucibulum
Species Crucibulum laeve
Crucibulum laeve (Huds.), Kambly, 1936 Common Bird's Nest

References and Further Reading

  • A Golden Guide: Non-Flowering Plants ©1967
  • Bird's Nest Fungi, Crucibulum laeve
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