Observation 1106: Amanita smithiana Bas

When: 2006-11-24

Collection location: Wilder Ridge, Humboldt Co., California, USA [Click for map]

Who: Nathan Wilson (nathan)

No specimen available

This is at least the third time I’ve found this large white Amanita growing under a particular set of Douglas firs on my parents property. I wasn’t able to dry a specimen this year, but I will the next time I come across it. I’m not completely comfortable with my id since the books I’ve looked in suggest that species has less of rooting base than this does.

Overall it was very poor collecting in southern Humboldt county this year. I believe the reason was an early cold snap which shutdown most of the mycorhizal species.

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Just for the record…
By: Nathan Wilson (nathan)
2008-01-16 00:50:26 CST (-0500)

I clarified that this collection was growing under Douglas fir, not red fir as might be inferred from Debbie’s comment. It’s still possible that the red tones come from tannins came from the Douglas fir, I just wanted to make sure the habitat was clear in case it matters some day in the future.

rooting base actually short for a smithiana!
By: Debbie Viess (amanitarita)
2008-01-15 17:37:40 CST (-0500)

Davin is correct; Thiers somehow swapped stipe descriptions between silvicola and smithiana. The rooting base of a smithiana is so long it is rarely collected. If you look closely at your photos, you can see where the base was broken off. I was more disturbed by the red coloration on the cap; but when I collected this mushroom in OR, also under red fir, it, too, was stained red, from rain dripping down from its host tree. I was also unable to dig one up entirely, since it was wrapped and tangled in the roots of its host tree, but I tried, time and time again.

A. smithiana
By: Darvin DeShazer (darv)
2006-11-29 09:27:04 CST (-0500)

Looks corrct to me! It should have a rooting base and the Amanita section of the Agaricales of California has an error in that portion of the description.