Observation 33446: Rhizopogon occidentalis Zeller & C.W. Dodge

When: 2010-02-11

Collection location: Canyon, Contra Costa Co., California, USA [Click for map]

Who: BakerSt10

No specimen available

Proposed Names

56% (4)
Eye3 Eyes3
Recognized by sight: Growing with Chinquapin & Knobcone Pine

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Eye3 = Observer’s choice
Eyes3 = Current consensus


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R. ochraceorubens
By: Daniel B. Wheeler (Tuberale)
2010-02-19 03:04:43 AEST (+1000)

as the name implies should have both darker brown ochre and reddish rhizomorphs. The yellow peridium especially near the gleba is very common for R. occidentalis. But I still have questions with the host.

By: BakerSt10
2010-02-14 09:22:28 AEST (+1000)

Claremont Chert in this area is upturned and drains very well. It breaks into smaller rock particles that then disintegrates into fine particles.

If Rhizopogon occidentalis and chert
By: Daniel B. Wheeler (Tuberale)
2010-02-14 08:14:33 AEST (+1000)

then this is an important observation. Typically found in sand dune areas near the coast or in deep volcanic soils in the Cascades. Chert is neither sandy or especially well-drained.

By: BakerSt10
2010-02-14 01:54:27 AEST (+1000)

It was growing with Claremont Chert a local formation. It had no noticeable odor

Hope you made a collection.
By: Daniel B. Wheeler (Tuberale)
2010-02-13 16:34:53 AEST (+1000)

R. occidentalis is not currently known with Knobcone pine, and no Rhizopogon I know of if associated with chinquapin. However, I agree tentatively that your photos do look like Rhizopogon occidentalis. Were they found in sandy soils? Was there an odor associated with them?

Created: 2010-02-12 09:45:54 AEST (+1000)
Last modified: 2010-02-12 09:45:54 AEST (+1000)
Viewed: 149 times, last viewed: 2018-02-16 19:12:15 AEST (+1000)
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