• Proposed
  • Under Assessment
  • 3Preliminary Assessed
  • 4Assessed
  • 5Published

Cantharocybe gruberi (A.H. Sm.) H.E. Bigelow & A.H. Sm.

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Scientific name
Cantharocybe gruberi
(A.H. Sm.) H.E. Bigelow & A.H. Sm.
Common names
IUCN Specialist Group
Mushroom, Bracket and Puffball
Assessment status
Under Assessment
Proposed by
Javier Marcos Martínez
Christian Schwarz
Noah Siegel
Noah Siegel
Comments etc.
Javier Marcos Martínez, Anders Dahlberg

Assessment Notes

ANDERS: Difficult to assess wit the little data. The same taxon in NAM and Europe.  Few records, can the habitat be identified better and the potantial habitat be used as a proxy for the species potential distribution and occurrence? Need to be elaborated more before being assessed


Cantharocybe gruberi is an uncommon species in North America, and reportedly very rare in Europe (France and Spain) and Northern Africa (Morocco) (but see .

Taxonomic notes

The relationship between the European/N. African taxon and the American C. gruberi is puzzling - the habitat differences, disjunct biogeography, and different morphological appearance contradict the apparent lack of genetic segregation.

It may be that the North American taxon and the European-African taxon are conspecific (based on apparent genetic concordance), but the ecology and morphology are distinctly different. The European/African taxon appears to have olive-capped fruitbodies which are dramatically darker than the pale creamy-gold specimens found in western North America.

Why suggested for a Global Red List Assessment?

Cantharocybe gruberi is an uncommon species in North America, and reportedly very rare in Europe (France and Spain) and Northern Africa (Morocco) (but see .

Geographic range

From Morocco, Africa:
Carlos Galan Boluda
Africa, Morocco, Tanger-Tétouan region, road between Ketama and Bab Berred, 1.646 meters above the sea level in a Cedrus atlantica forest. Growing on soil in a margin of a dead Cedrus atlantica tree.
Coordinates : 34°58’03.22"N 04°43’39.20"W

Distribution in western North America: Widespread in the western mountains, but only known from 11 voucher-confirmed locations. Known from three locations (vouchered collections), and a few additional photo records in California. Also known from the Cascades in Oregon and Washington, the northern Rocky Mountains, and New Mexico and Arizona.

USA: CALIFORNIA: Siskiyou Co., Shasta-Trinity National Forest, off FS Road 49. Shasta-Trinity National Forest, near McCloud (unconfirmed). Sierra Co., Tahoe National Forest, Cottonwood Creek Campground. Green Acres. El Dorado
Co., Eldorado National Forest, Pipi Valley (unconfirmed). OREGON: Jefferson Co., Suttle Lake. WASHINGTON:
Skamania Co., Gifford Pinchot National Forest, west of Trout Lake. Okanogan Co., Mt. Annie. IDAHO: Valley
Co., Cascade Christian Camp. Latah Co., Juliet (Type). ARIZONA: Coconino Co., near Flagstaff (unconfirmed).
NEW MEXICO: Santa Fe Co., near Santa Fe. Sandoval Co., Jemez Mountains. CANADA: BRITISH COLUMBIA:
Manning Park.


Population and Trends

There is not sufficient information to make any assessments about potential population sizes or trends at present.
However, if it becomes apparent that there is some close connection to Ponderosa Pine, there may be local threats to the species in California due to bark beetle infestations and drought.

Population Trend: Uncertain

Habitat and Ecology

This species grown in coniferous forests, among needles, mainly Pinus spp.

In North America, typically found as solitary fruitbody, more rarely in small clumps, growing from duff and soil, sometimes near decaying wood; always near conifers, perhaps most frequently with pines. Fruiting in spring and early summer, more rarely in fall. Nutritional mode unknown, most likely not ectomycorrhizal.

Temperate Forest


Conservation Actions

Research needed

Resolution of the

Use and Trade



Bigelow, Howard E. 1973. Cantharocybe, a new genus of Agaricales. Mycologia 65: 485–488.

Desjardin, D.E., M.G. Wood. & F.A. Stevens. 2015. California Mushrooms: The Comprehensive Identification Guide. Timber Press. Portland, OR.

The first ITS phylogeny of the genus Cantharocybe (Agaricales, Hygrophoraceae) with a new record of C.
virosa from Bangladesh. MycoKeys 14: 37-50.

Smith, A.H. 1944. New North American Agarics. Mycologia. 36: 242–262
Mushroom Observer. http://mushroomobserver.org

MyCoPortal. Mycology Collections Portal. Available at: http://mycoportal.org

Country occurrence

Regional Population and Trends

Country Trend Redlisted