Observation 17624: Hymenogaster Vittad.

When: 2009-01-15

Collection location: Oregon, USA [Click for map]

Who: Alan Rockefeller (Alan Rockefeller)

No specimen available

Ice House Shaman collection.

This observation is the black truffle like fungi which is surrounded by Tuber oregonense in the photo.

It had a sharp and very interesting odor. Possibly could be pleasant.

Divisions are 10.8 micrometers. Spores measure 18 – 24 × 12 – 15.

Species Lists


Proposed Names

1% (2)
Based on microscopic features: Just an idea, but the wrinkled spores with a WIDE attachment point and a small umbo at the apex look like Hysterangium, but they are too wide for any species I can find in my literature.
87% (1)
Recognized by sight
50% (4)
Recognized by sight

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= Observer’s choice
= Current consensus


Add Comment
While Hymenogaster subalpinus
By: Daniel B. Wheeler (Tuberale)
2014-01-19 01:52:28 UTC (+0000)

is not poisonous, it is not pleasant either. A singe Hymenogaster mixed with half-a-pound of Tuber oregonmense still tastes of Hymenogaster. Not a taste many would welcome a second time.

I’m curious how the black color came about. Most H. subalpinus is white to begin with. It stains or erodes to the black gleba with handling or with washing.

This is a Hymenogaster species
By: Michael Castellano (trufflercaz)
2009-07-07 16:10:01 UTC (+0000)

Typical strong farinaceous smell (like green corn) and brown warty spores, found abundantly with Tuber species in Oregon. We have called it Hymenogaster parksii in the past but now realize that was wrong and it goes by H. subalpinus currently.