Observation 193911: Rhizopogon occidentalis Zeller & C.W. Dodge

When: 2014-12-10

Collection location: East Bay hills, Oakland, California, USA [Click for map]

Who: aupanner

No specimen available

Growing in dirt near Monterey pines and Eucalyptus.

Species Lists


The original observation.
A week later shows continued growth and darkening of the splits.

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I have found it with P. radiata
By: Daniel B. Wheeler (Tuberale)
2014-12-18 02:28:56 EET (+0200)

in Oregon, so likely the same. I meant to say well-drained soil. Glad you added that information. Eucalyptus and Live Oak don’t host Rhizopogons that I am aware of. Live Oak especially is sort of rare in Oregon except for Roseburg and areas south: about the same range as Oregon myrtle.

Pinus radiata
By: aupanner
2014-12-17 22:44:49 EET (+0200)

I thought the same about the splitting. It has been a season of sudden and heavy rains. There was another nearby with a more regular oval shape, but I haven’t been able to locate it for a subsequent photo.

It is nearby the 3-needled Pinus radiata (Monterey), Live Oak, and Eucalyptus. The soil is not particularly sandy, but is well draining due to the slope.

The yellow or orange rhizomorphs
By: Daniel B. Wheeler (Tuberale)
2014-12-17 21:46:48 EET (+0200)

on the peridium are distictive for R. occidentalis. The rapid growth indicates a long growing season, and abundant rainfall, which results in the sporocarp splitting like this. Should be near 2-needle pine like Pinus contorta. Soil should have a sandy element to it.

Created: 2014-12-17 09:30:02 EET (+0200)
Last modified: 2014-12-17 22:52:16 EET (+0200)
Viewed: 29 times, last viewed: 2017-06-19 23:24:25 EEST (+0300)
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