Observation 84632: Amanita fallax Tulloss & G. Wright nom. prov.
When: 2011-10-05
No herbarium specimen

Notes: Under pine.

Spores amyloid, 10.1 – 11.5 (11.8) x 6.3 – 6.9 μm. Q = 1.60 – 1.81.

11.8 × 6.5 μm.
11.8 × 6.8
11.5 × 6.5
11.1 × 6.7
11.1 × 6.5
10.6 × 6.9
10.1 × 6.3
10.1 × 6.3

Proposed Names

29% (1)
Recognized by sight: Reddish colors. Robust volva. Appendiculate pileus margin.
Based on microscopic features: Amyloid spores.
58% (1)
Eye3 Eyes3
Recognized by sight: Pine habitat
Based on microscopic features: Spore size and shape

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Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
“Amanita fallax”
By: R. E. Tulloss (ret)
2011-12-14 21:49:20 CST (-0500)

I’m now inclined to think that my provisional taxon “Amanita fallax” actually includes two species. I have collected them both in Mexico. I compared your spore size-shape data with the data for the current (possibly mixed) information for fallax and your data fits inside the sporograph for that species. Since I don’t know for sure of other Mexican taxa in Amidella, I suggest you may have collected something that fits into the current concept of fallax.

Yours could also match those of A. volvata; however, the upper part of the stipe in your images does not have a dense coating of floccose material, which is the case in sect. A. volvata. I have looked at a lot of herbarium material assignable to sect. Amidella from Mexico and have not found that any of it was a good match to A. volvata. Hence, I’m inclined to think that it is unlikely that the specimen you photographed is A. volvata.


nice documentation, Alan.
By: Debbie Viess (amanitarita)
2011-12-14 12:18:03 CST (-0500)

Created: 2011-12-14 08:36:59 CST (-0500)
Last modified: 2013-03-07 22:34:35 CST (-0500)
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