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Observation 145300: Rhizopogon atroviolaceus

When: 2013-09-12

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 alongside trail west of parking lot 200 yards. Associated mostly with Noble fir, but there were Western hemlock within 150 feet. Brown rhizomorphs, gleba white in youth, then yellowish-green, finally greenish-brown to greenish-gray. Four specimens were found in space of 1.5 square yards, most still hypogeous (one with dark brown exposed peridium).

Species Lists


Whole sporocarp. Lots of soil adherring to sporocarp.
Sporocarp after sectioning.
After first section. Notice cream to yellowish gleba, with blue-staining areas.
Sectioned sporocarp, with grayish-green gleba.

Proposed Names

57% (1)
Used references: NATS Field Guide To Selected North American Truffles and Truffle-like Fungi

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