Pachycudonia spathulata

Pachycudonia spathulata, commonly known as Manzanita butter clumps, is a rare and little-known fungus that grows in association with manzanita and Pacific madrone trees on the west coast of North America.[2][3] This fungus was first described in 1942 by Sanshi Imai as Cudonia spathulata and renamed by Imai in 1950 to Pachycudonia spathulata.[4][5][lower-alpha 1]

Pachycudonia spathulata
Sonoma County, California, 2023
Scientific classification
Domain: Eukaryota
Kingdom: Fungi
Division: Ascomycota
Class: Leotiomycetes
Order: Rhytismatales
Family: Cudoniaceae
Genus: Pachycudonia
Species:
P. spathulata
Binomial name
Pachycudonia spathulata
(S.Imai) S.Imai (1950)
Synonyms[1]
  • Cudonia spathulata S.Imai (1942)
  • Spathularia spathulata (S.Imai) Mains (1956)

Mycologists are investigating the range of this fungus and seeking new observations and specimen collections.[7]

Notes
  1. Pachycudonia was proposed as a section of the genus Cudonia in 1936.[6]

References
  1. "GSD Species Synonymy. Current Name: Pachycudonia spathulata (S. Imai) S. Imai, Bot. Mag., Tokyo 63: 235 (1950)". Species Fungorum. Retrieved 8 February 2024.
  2. "Cudonia spathulata (Manzanita Butter Clumps)". iNaturalist. Retrieved 2024-02-16.
  3. Siegel, Noah; Vellinga, Else C.; Schwarz, Christian; Castellano, Michael A.; Ikeda, Diane (2019). A Field Guide to the Rare Fungi of California's National Forests (PDF). Minneapolis, Minnesota: Bookmobile. pp. 267–268. OCLC 1349507560.
  4. "Pachycudonia spathulata (302170)". Mycobank.
  5. "Pachycudonia spathulata (S.Imai) S.Imai". www.gbif.org. Retrieved 2024-02-16.
  6. Science Reports of the Yokohama National University: Biological and geological sciences (in Japanese). Faculty of Education, Yokohama National University. 1953.
  7. Roo Vandegrift, Bitty A. Roy & Joanne Schwartz (October 2020). "Manzanita Butter Clumps" (PDF). Fungal Diversity Survey (FUNDIS.org). Sebastopol, California.
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