Observation 13948: Rhizopogon occidentalis Zeller & C.W. Dodge

When: 2008-11-09

Collection location: Salt Point State Park, Sonoma Co., California, USA [Click for map]

Who: Alan Rockefeller (Alan Rockefeller)

No specimen available

Half buried

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By: Daniel B. Wheeler (Tuberale)
2008-11-11 14:12:41 -02 (-0200)

My immediate impression is R. occidentalis. But in my area (northern Oregon) R. occidentalis is restricted to Pinus contorta or Lodgepole pine. We have neither of the pine species named, but if 2-needle pines, could still be R. occidentalis and a new host species! Rather exciting, really. Still would need a voucher collection, with a needle of the nearest pines noted. If you can find more and dry a specimen, send for a free identification to: Dr. James Trappe, c/o Forestry Sciences Lab, 3200 Jefferson Way, Corvallis, OR 97330. Include a self-addressed stamped postcard so Dr. Trappe can tell you what the specimen is.

An interesting thing about most mycorrhizal species such as Rhizopogon, is that while there is a gradual succession of species over time, you can return many years to find the same fungus in the same approximate location for several years.

By: Erin Page Blanchard (CureCat)
2008-11-10 20:29:51 -02 (-0200)

Quite often, yes.

In a V-shape?
By: Paul Derbyshire (Twizzler)
2008-11-10 20:21:24 -02 (-0200)
By: Erin Page Blanchard (CureCat)
2008-11-10 19:54:53 -02 (-0200)

Pinus muricata also has two needles per fasicle and is common in the area where this mushroom was found.

By: Paul Derbyshire (Twizzler)
2008-11-10 19:11:33 -02 (-0200)

Pinus banksiana also has needles that look like that.

By: Darvin DeShazer (darv)
2008-11-10 12:02:24 -02 (-0200)

Salt Point has Pinus muricata, bishop pine.

Rhizopogon species confirmed
By: Daniel B. Wheeler (Tuberale)
2008-11-10 09:07:26 -02 (-0200)

The yellowish rhizomorphs and interior locules confirm this is a Rhizopogon. To give a more specific identification, need to know what tree species were nearby, and whether this was found in sandy or well-drained location. Your photo appears to show a Rhizopogon occidentalis, which is quite common in sandy or well-drained areas near the coast in association with Lodgepole pine (Pinus contorta). Your photograph appears to show a needle of Pinus contorta.

Created: 2008-11-10 04:13:24 -02 (-0200)
Last modified: 2014-01-03 04:21:49 -02 (-0200)
Viewed: 69 times, last viewed: 2018-01-29 01:29:22 -02 (-0200)
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