When: 2009-10-27

Collection location: San Rafael, Marin Co., California, USA [Click for map]

Who: Ken Stavropoulos (pennybun)

No specimen available

under pine

[admin – Sat Aug 14 02:05:34 +0000 2010]: Changed location name from ‘San Rafael, CA’ to ‘San Rafael, California, USA’

Species Lists


Proposed Names

61% (2)
Recognized by sight
75% (2)
Recognized by sight: The threads on the outer surface and the spongy inside point to Rhizopogon, perhaps R. occidentalis. I leave it to the trufflers to propose a species.
84% (1)
Recognized by sight: NOTE: Must be associated with either 2- or 3-needle pine to be R. occidentalis. Rhizomorphs are yellowish to light reddish, but overall peridium composed of felt-like matt of tiny yellow to light buff rhizimes with larger, vein-like rhizomorphs; gleba does not appear to have much coloration, so probably immature. However, since a single Rhizopogon may produce millions if not billions of spores, it is still likely that at least some mature spores could be found in the gleba. Often visible slightly erumpent, but typically mostly hypogeous, often in sandy or well-drained soils. I have found it with Pinus contorta and Pinus ponderosa, but it is known from other 2- and 3-needle pines.
Used references: Field Guide to North American Truffles, p. 76

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= Observer’s choice
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