Observation 201094: Tuber castellanoi Bonito & Trappe
When: 2015-03-20
No herbarium specimen
0 Sequences

Found this in our back yard today

Proposed Names

-54% (1)
Used references: Arora, mushrooms demystified
56% (1)
Recognized by sight
Used references: Field Guide to North American Truffles, by Matt Trappe, Frank Evans, and James Trappe. c. 2007 by Ten Speed Press.
82% (1)
Eye3 Eyes3
Used references: Sent to Jim Trappe for Identification

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Eye3 = Observer’s choice
Eyes3 = Current consensus


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Tuber castellanoi
By: Courtney and Pat (theroach's)
2015-05-23 12:39:43 COT (-0500)

A specimen was sent to Jim Trappe at Oregon State for identification.

Tuber gibbosum
By: Daniel B. Wheeler (Tuberale)
2015-03-27 18:29:04 COT (-0500)

is species specific to Douglas-fir. Means found only with Douglas-fir. No other tree species supports Tuber gibbosum, ever, that is currently known.

Yes, you have posted a photo of spores in an ascus, but neglected to include spore size or anything indicating size. At this time, Tuber would be a correct identification of the observation.

Tuber gibbosum has been found mature as early as December (Fort Vancouver, Washington) to July (personal collection, confirmed by J. Trappe). Most are found from April to June. Depending on where you are located, maturity may take until early June at least. Yes, it is possible to find isolated ascii with mature spores in them in younger material. But maturity by definition is when 60% or of the ascii are mature.

Should you find more examples, I would be happy to amend my suggestion. Source of my information: Field Guide to North American Truffles, by Matt Trappe, Frank Evans, and James Trappe, c. 2007 Ten Speed Press.

By: Courtney and Pat (theroach's)
2015-03-27 01:35:26 COT (-0500)

I posted a picture of the spores. Boulder creek is in the Santa Cruz mountains. Not much smell when we found it but it is coming up, seems like it is ripening.

Any odor?
By: Daniel B. Wheeler (Tuberale)
2015-03-25 12:20:02 COT (-0500)
Both conifers and live oak
By: Daniel B. Wheeler (Tuberale)
2015-03-25 12:19:31 COT (-0500)

are well within the mycorrhizal range of this fungus.

If one of the bonzais is Douglas-fir (which does rarely form bonzai-type trees, it is unlikely a bonzai would remaim a low-growing tree if associated with Tuber gibbosum, which can produce growth-spurts of 6+ feet in Douglas-fir in a single year.

Most closely resembles Tuber gibbosum, especially in CA and in dry years. For precise confirmation, I think it would be good to attempt to find additional sporocarps. If more are found near live oak, could be an undescribed species with important consequences.

The gleba (interior) seems to show a gray-charcoal texture associated with Tuber gibbosum. But I’ll have to check where Boulder Creek is located before saying further.

Re: Trees
By: Courtney and Pat (theroach's)
2015-03-21 11:02:45 COT (-0500)

It was near a bunch of ornamental bonsai’d conifers that the previous owners planted not sure what they are (we can send pictures if you want them) About 10ft away is a 4 inch in diameter live oak.
Hope this helps

By: Alan Rockefeller (Alan Rockefeller)
2015-03-21 00:51:21 COT (-0500)

What kind of trees are nearby?

How far is the nearest Douglas fir and the nearest coast live oak?

Created: 2015-03-20 23:03:08 COT (-0500)
Last modified: 2015-05-23 12:38:44 COT (-0500)
Viewed: 221 times, last viewed: 2017-08-23 09:19:25 COT (-0500)
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