When: 2014-06-03

Collection location: MP 14.5 E. Larch Mountain Rd., Multnomah Co., Oregon, USA [Click for map]

Who: Daniel B. Wheeler (Tuberale)

No specimen available

Found in raised soil area, like a mole hole, next to trail. Kicked it with my foot, and out popped this.

While Elaphomyces can be broken into species, it is difficult even for experts. I have the collection here, if anyone wants to attempt that feat.

Fungus is enhaloed with dirt on most of the surface, but has some exposed peridium. Looks ashy. Spore mass (gleba) is powdery, black, with abundant spores. Spores went over everything. When freshly cut the peridium stained pinkish to reddish, and was otherwise white. Associated with Noble fir.

Peridium without embedded spore clumps.

Species Lists


Spore mass (gleba) is enclosed within a peridium that is 3mm thick. No apparent warts on peridium exterior.
Exposed peridium is brownish, with adherring soil. Note rhizomorphs or rootlet on right-hand side.

Proposed Names

57% (1)
Recognized by sight
Used references: NATS Field Guide To Selected North American Truffles and Truffle-like Fungi, by Trappe, Evans and Trappe.

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= Observer’s choice
= Current consensus


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Created: 2014-06-05 02:18:28 CST (+0800)
Last modified: 2014-06-05 02:22:31 CST (+0800)
Viewed: 15 times, last viewed: 2019-07-14 06:54:47 CST (+0800)
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