Observation 193979: Armillaria (Fr.) Staude

When: 2014-12-18

Collection location: 7700 SE Stephens St., Portland, Multnomah Co., Oregon, USA [Click for map]

Who: Daniel B. Wheeler (Tuberale)

No specimen available

Growing from remains of a Bigleaf maple tree, which was cut 3 years ago. Appears well-colonized, including the roots.


In situ. Depression was site of Bigleaf maple tree, about 7’ diameter.
Between the downspout and the rose bush are two large clusters of young Armillaria.
Younger cluster just emerging from edge of depression. Temperature has been between 34 and 40 degrees at night.
Upper specimen has white gills just emerging, lower specimen has mature honey-colored gills. Both have stout stipes.
From further away, specimen on left cap is 4" across (= over 11cm).
Immature gills.
Mature gills showing honey-color.

Proposed Names

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Found at same location as
By: Daniel B. Wheeler (Tuberale)
2014-12-21 15:19:24 PST (-0800)

MO 153191.