Observation 137915: Amanita sect. Validae (Fr.) Singer

When: 2013-06-07

Collection location: Big Thicket, Polk Co., Texas, USA [Click for map]

Who: Ron Pastorino (Ronpast)

No specimen available

Single specimen growing in mixed woods in the Big Sandy Creek Unit.
Cap 4.0 cm across.
Spores white and amyloid.
Spores ~ 7.3-10.0 X 4.4-5.0 microns, mostly elongate.
Q(ave) = 1.75. Q(range) = 1.52-2.00.
Did not detect any odor.
Specimen decayed and only retained a partial spore print.
No matches found so far.

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Eye3 = Observer’s choice
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Yup. Amanita media was the species I was thinking about.
By: R. E. Tulloss (ret)
2013-06-28 23:33:20 -05 (-0500)

Jenkins’ measurements for the spores were: (9.4-) 10.2 – 12.5 × 4.7 – 5.5 µm, (Q = 1.99 – 2.29; Q’ = 2.12)

See http://www.amanitaceae.org?Amanita+media

Very best,


The spore size and shape makes me think of some of the species…
By: R. E. Tulloss (ret)
2013-06-28 23:30:23 -05 (-0500)

that Jenkins described from the SE U.S. that he said were very difficult to place (his options being the Validae and sect. Lepidella). At least one of them had relatively high Q as you report here.

One name that comes to mind is Amanita media; but it’s been a long time since I read anything about it. I have to read WAO and refresh the little gray cells.


Created: 2013-06-28 22:50:16 -05 (-0500)
Last modified: 2013-06-28 22:50:18 -05 (-0500)
Viewed: 56 times, last viewed: 2018-04-19 09:40:01 -05 (-0500)
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