Observation 14114: Rhizopogon parksii A.H. Sm.

When: 2008-11-13

Collection location: Southeast Portland, Multnomah Co., Oregon, USA [Click for map]

Who: Daniel B. Wheeler (Tuberale)

No specimen available

All pictures are from a single largish clump of Rhizopogons, which were barely visible under a hump in grass near Douglas fir. This is kind of surprising, because I almost daily walk past this tree, and this is the first Rhizopogon I have found here. Haven’t tried to key it out yet. The peridium is rather dark grayish-brown to grayish-black, with white areas. The gleba is pale brown to olivaceous-brown, with areas of darker brown, bluish-black and vinaceous staining. The peridium has a single mycelial tuft at the base, which all specimens were growing outward from, nearly a columella-like structure as it was over 1/4 inch in diameter. Sub-peridial stains include black, blue-black, vinaceous, and reddish, depending on individual and maturity.

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Proposed Names

57% (1)
Eye3 Eyes3
Recognized by sight
Used references: Aurora’s Mushooms Demystified. This is the first time I have attempted to use the key in Aurora for Rhizopogons. While this could be R. parksii, I will reserve final judgement until I get a definitive answer from the lab at OSU. However, R. parksii is one of the most frequently submitted species to the lab, and can rarely reach this size. I have never personally seen it discolor nearly black before, though. Photos seem to show more dark brown than black, but with sporocarps in hand, it was definately black or blackish when just poking through the surface of the soil. Saw another sporocarp at same general location yesterday, and will take more photos of it today.

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Eye3 = Observer’s choice
Eyes3 = Current consensus


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Created: 2008-11-13 09:09:26 HST (-1000)
Last modified: 2008-11-13 09:09:26 HST (-1000)
Viewed: 52 times, last viewed: 2018-03-07 06:16:46 HST (-1000)
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