Observation 108082: Pisolithus Alb. & Schwein.

When: 2012-09-02

Collection location: Norfolk, Virginia, USA [Click for map]

Who: Kathryn Kauffman (k6logc)

No specimen available

Proposed Names

28% (1)
Recognized by sight

Please login to propose your own names and vote on existing names.

Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
There’s only one species that I know of now.
By: Daniel B. Wheeler (Tuberale)
2012-09-03 17:33:00 MDT (-0600)

Pisolithus arrhizus. Used to be P. tinctorius, but the names were combined several years ago.

P. arrhizus is mycorrhizal with many tree and shrub species. I have found it with pine, rhododendron, oak, birch and several other species.

It is something of a pioneer mycorrhizal fungi, often the first to colonize wasted areas, like old mine tailings, badly eroded areas, and soils with almost no humus.

A neat thing about Pisolithus arrhizus is its ability to concentrate heavy metals. It can leach these often heavy metals out of the surrounding soil, and concentrate them in the fruiting bodies. This effectively detoxifies soils.

Answers to comment questions…
By: Kathryn Kauffman (k6logc)
2012-09-03 12:36:02 MDT (-0600)

Hi Daniel,

I didn’t collect or do cross-sections of any of these. What groups would the stipe or pseudostipe help distinguish between?

I think the tree was a sweetgum tree, Liquidambar styraciflua (even though there are oak leaves in the picture).

It was in a park near a baseball field though it probably does get some washout from a dirty little stream nearby when it floods. Why the question about being near waste?


With oak?
By: Daniel B. Wheeler (Tuberale)
2012-09-02 23:07:04 MDT (-0600)

was this observed in a waste area, by chance?

Does resemble superficially Pisolithus.
By: Daniel B. Wheeler (Tuberale)
2012-09-02 23:05:26 MDT (-0600)

and it may prove to be so. But can’t make out any peridioles for certainty.

Did you collect this?
By: Daniel B. Wheeler (Tuberale)
2012-09-02 14:00:43 MDT (-0600)

Need a photo of a cross-section through the stipe or pseudostipe, whichever it proves to be.

Created: 2012-09-02 09:39:25 MDT (-0600)
Last modified: 2012-09-02 14:05:07 MDT (-0600)
Viewed: 57 times, last viewed: 2017-06-13 22:46:40 MDT (-0600)
Show Log