Observation 9325: Hydnotrya Berk. & Broome

When: 2005-10-17

Seen at: Portland, Multnomah Co., Oregon, USA [Click for map]

Who: Daniel B. Wheeler (Tuberale)

No specimen available

Collection displayed at the 2005 Oregon Mycological Society Fall Mushroom Show, Oct. 17, 2005. After discussing this species with Adrian Beyerle at length, we determined this was likely Hydnotrya colossa, the largest known species of the Hydnotrya family, which is currently known from less than 5 collections. This particular specimen was found near Timothy Lake, Clackamas Co., OR near Western hemlock at about 3200 feet elevation. The displayed collection is approximately 1/4 of the total sporocarp found.



Proposed Names

37% (2)
Recognized by sight
83% (1)
Recognized by sight: no H. colossa listed in IF or Mycobank

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Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
Hydotrya species for sure, what species name is yet to be determined
By: Michael Castellano (trufflercaz)
2009-07-07 11:37:09 CDT (-0400)

There is no doubt that this specimen is a Hydnotrya species. To date there is not a H. colossa species name. As usual putting generic names on truffles is usually much easier than getting a species name. A species name msot often is the result of microscopic study of the spores and micro-features of sterile tissues. When in doubt send it to me for species identity.

Send me an email for the protocol for sending specimens in for ID.

Created: 2008-08-16 03:56:13 CDT (-0400)
Last modified: 2015-02-25 17:58:30 CST (-0500)
Viewed: 93 times, last viewed: 2018-03-23 03:01:37 CDT (-0400)
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