• Proposed
  • 2Under Assessment
  • 3Preliminary Assessed
  • 4Assessed
  • 5Published

Rhizopogon olivaceotinctus A.H. Sm.

Search for another Species...

Scientific name
Rhizopogon olivaceotinctus
A.H. Sm.
Common names
IUCN Specialist Group
Mushroom, Bracket and Puffball
Assessment status
Proposed by
Noah Siegel
Comments etc.
Noah Siegel

Assessment Notes

Taxonomic notes

Described from California, USA (Smith & Zeller 1966). Alpova olivaceotinctus (A.H. Sm.) Trappe is a synonym.

Why suggested for a Global Red List Assessment?

Rhizopogon olivaceotinctus is one of the most common post fire ectomycorrhizal species in the Sierra Nevada and coastal pine forest of California (Glassman et al. 2015).

Even though it is only known from ~25 collections, it is highly under reported, and it should be listed as Least Concern (LC).

Geographic range

Occurring throughout the mountains and coastal pine forests of California, into southern Oregon, USA.

Population and Trends

Although fruit bodies of this species are rarely collected; currently known from ~25 collections (Mycoportal 2021) Rhizopogon olivaceotinctus is one of the most abundant ectomycorrhizal post-fire species in the Sierra Nevada and coastal pine forest (Glassman et al. 2015).

Fruitings are rare in mature forest. It forms spore banks in the soil, waiting for fire, and forest regrowth to grow. The spores of R. olivaceotinctus exhibit a high tolerance to heat (Peay et al. 2009). Glassman et al. (2015) state “R. olivaceotinctus and R. arctostaphyli were the most frequent colonizers of Pinus ponderosa seedlings in the field” on post Rim Fire plots near Yosemite National Park on Stanislaus National Forest, California, USA.

Population Trend: Stable

Habitat and Ecology

Ectomycorrhizal with pine (Pinus spp.), fruiting post forest fire, or disturbance with young pine trees. Fruitings are rare in mature forest. It forms spore banks in the soil, waiting for fire and forest regrowth to grow.

Temperate Forest


No specific threats have been identified with regards to this species.

Conservation Actions

This species is included on the United States Forest Service Northwest Forest Plan Survey and Manage list of rare/old growth forests dependent fungi, and has been actively surveyed for since the late 1990’s. (Castellano et al. 1999).

Research needed

No specific research is needed with regards to this species.

Use and Trade

None known.


Castellano, M.A., Smith, J.E., O’Dell, T., Cázares, E. and Nugent, S. 1999. Handbook to Strategy 1 Fungal Species in the Northwest Forest Plan. U. S. Department of Agriculture, Forest Service, Pacific Northwest Research Station: Portland, OR. 195 p.

Glassman, S.I, Levine, C.R., DiRocco, A.M., Battles, J. and Bruns, T.D. 2016. Ectomycorrhizal fungal spore bank recovery after severe forest fire: some like it hot. ISME Journal 10: 1228–1239.

MyCoPortal. 2021. http://mycoportal.org/portal/index.php. Accessed on February 12.

Peay, K.G., Garbelotto, M. and Bruns, T.D. 2009. Spore heat resistance plays an important role in disturbance-mediated assemblage shift of ectomycorrhizal fungi colonizing Pinus muricata seedlings. Journal of Ecology 97: 537–547.

Smith, A.H. and Zeller, S.M. 1966. A preliminary account of the North American species of Rhizopogon. Memoirs of the New York Botanical Garden 14: 1–178.

Country occurrence

Regional Population and Trends

Country Trend Redlisted