When: 2007-11-22

Collection location: San Francisco, San Francisco Co., California, USA [Click for map]

Who: Alan Rockefeller (Alan Rockefeller)

No specimen available

I gathered this for dinner.

Proposed Names

28% (1)
Recognized by sight
87% (4)
Recognized by sight: I’d have a hard time calling this anything besides A. mellea. There are no significat scales on the cap like A. ostoyae has, and the rest of the annulate Armillaria species are not caespitose.

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

= Observer’s choice
= Current consensus


Add Comment
Looking more closely I’ll go with Darvin’s call
By: Nathan Wilson (nathan)
2007-11-23 11:51:01 CST (-0500)

Especially if that root in the fourth shot is from a pine not an oak.

Armillaria ostoyae
By: Darvin DeShazer (darv)
2007-11-23 11:39:48 CST (-0500)

The brown flocks on the edge of the thick, persistent annulus along with whitish cap fibrils that age into dark scales, caespitose growth. At least some of the basidia should have clamps at the base. Here is a link to a key in Mycotaxon (1987) to five species of Armillaria that I have been using along with the Volk web site. http://www.cybertruffle.org.uk/cyberliber/59575/0030/0102.htm