When: 2007-11-30

Collection location: Petaluma, Sonoma Co., California, USA [Click for map]

Who: Darvin DeShazer (darv)

Specimen available
Collection number: Darvin DeShazer DD 614

DD 614

Species Lists


Proposed Names

11% (3)
Recognized by sight
9% (3)
Recognized by sight: I doubt this is B. coccyginus, which is close to the B. fraternus group.
22% (2)
Used references: Jonathan Frank ran the DNA and said it came out close to Hortiboletus campestris.
Based on chemical features: DNA sequence

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

= Observer’s choice
= Current consensus


Add Comment
Be that as it may,…
By: I. G. Safonov (IGSafonov)
2020-06-12 13:51:21 PDT (-0700)

…the species concept of H. campestris has not been clarified by DNA studies of this group (as they don’t exist), and no genetic info on the type exists. The paper probably meant ‘campestris s.l.’.
If you BLAST the full-length ITS sequence derived from this collections, there are no matches in GenBank, and the top hit is only 97% similar. Hence it’s unlikely to be the eastern H. campestris. Yours appears to be an undescribed western taxon.

Published as Hortiboletus campestris
By: Darvin DeShazer (darv)
2020-06-05 10:48:12 PDT (-0700)

This specimen is listed in the DNA tree in this paper.

Frank JL, Siegel N, Schwarz CF, Araki B, Vellinga EC (2020). Xerocomellus (Boletaceae) in western North America. Fungal Systema cs and Evolu on 6: 265–288. doi: 10.3114/fuse.2020.06.13

I Agree
By: BakerSt10
2011-05-14 07:02:17 PDT (-0700)

I think that Christian is correct it looks very similar, any more info would be helpful.

By: Christian (Christian Schwarz)
2011-05-13 21:03:16 PDT (-0700)

like what Deb has been calling B. amyloideus – microscopy on this would be good.
Other than the spores, the more rose-colored cap is a good indicator, but spore info would put it to rest.