When: 2007-10-27

Collection location: Redwood National Park, Orick, California, USA [Click for map]

Who: Douglas Smith (douglas)

Specimen available

I’m not sure what these are, but Dr. Largent had a name for these. But this happened pretty often, you would wave a mushroom under his nose, and he would spout a name, and some detail about the thing. But before you could remember the name, or ask more, he would be off, and you never got the name down for later.

These are all white when young, but develop yellow patches, and bruise yellow slowly. They also have a fruity odor, with a hint of citrus.

If anyone has an idea let me know.

5/26/2008 – Getting back to these. I was inspired to look back at these from the Fall 2007 edition of Mushroom, the journal. This edition has a nice photo of these, in fact, it is exactly this photo of these! He took this photo and used in the mag. There the editor named these A. avellaneus which is going further than I had, so I thought it would go back to these.

In most books/keys for these you would get to A. ovinus, but the shape, mostly all white/off-white color, and fruity odor doesn’t really march. The Pacific NW key to Polypores has a note for A. ovinus that there is A. avellaneus, and you can tell the difference in that the spores are 5-5.5 in length, where A. ovinus spores are 3.5-4 um in length.

I’ve added a micro-shot here, which is of the inside of a pore at 1000x in Meltzer’s. In this shot there is a basidia, and it is 4-spored, and the spores are amyloid. Looking at 6 spores the ave. size is length 4.58 +/- 0.22, width 4.06 +/- 0.17.

I found somewhere in a publication for A. citrina (or something like that) that A. ovinus spores are inamyloid and that A. avellaneus are amyloid, but I can’t seem to find that ref. now. Also in the Pacific NW key there is a note (crypticly), that A. subrubescens has amyloid spores.

The spore size here is a little small for A. avellaneus, but it large for A. ovinus. Given the area (coastal Humbolt Co.), shape, look, odor, and amyloid spores, I’m going with A. avellaneus. Also to agree with the already published id in Mushroom the journal…

Proposed Names

28% (1)
Recognized by sight
51% (4)
Used references: Key to polypores of Pacific NW
Based on microscopic features: Spores amyloid, gt. 3.5 um long.
55% (1)
Recognized by sight: according North American Polypores A. avellaneus has inamyloid spores larger then these. A. ovinus also has inamyloid spores that are smaller. Albatrellus subrubescens has spores 3.5-4.5 × 2.5-3.5, distinctly amyloid.

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

= Observer’s choice
= Current consensus


Add Comment
Albatrellus avellaneus
By: Darvin DeShazer (darv)
2007-11-03 17:34:14 CET (+0100)

Albatrellus avellaneus comes to mind. I remember the citrus odor, but not sure if this is the species name for it.