Observation 32310: Amanita amerirubescens Tulloss nom. prov.

When: 2009-06-19

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

Who: Mark Prosser (mark prosser)

No specimen available

Best guess has been Amanita porphyria, but since we have extensive Amanita knowledge and experience on the MO site I’m open to all corrections. Found beneath conifers on sloped hill following series of almost daily rains during early Summer of 2009, near Blacksburg, Virginia. Thanks, Mark

[admin – Sat Aug 14 01:58:38 +0000 2010]: Changed location name from ‘Blacksburg, Virginia, U.S.A.’ to ‘Blacksburg, Virginia, USA



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By: R. E. Tulloss (ret)
2010-01-21 18:08:05 EET (+0200)

You’re welcome.


By: Mark Prosser (mark prosser)
2010-01-21 05:59:20 EET (+0200)

Much thanks again for your help and expertise. Mark

You’d need a gray annulus and a bulb like that on what N. Americans call “A. citrina”
By: R. E. Tulloss (ret)
2010-01-21 04:50:58 EET (+0200)

In A. porphyria the ring is gray and the stipe often has a covering of gray fibrils. In fact there is a watercolor by Schweinitz (co-author of the species) in which all visible parts of the fruiting body are gray or grayish. My guess is that the specimen photographed may be A. amerirubescens nom. prov.

Very best,


Created: 2010-01-21 03:52:44 EET (+0200)
Last modified: 2010-08-20 05:13:48 EEST (+0300)
Viewed: 71 times, last viewed: 2018-08-27 21:04:28 EEST (+0300)
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