Observation 136038: Amanita praecox Y. Lamoureux nom. prov.
When: 2013-05-18

Notes: Cap: 1 15/16 – 2 1/16 inches, lemon yellow
Stipe: 2-2.5 inches
Bulb: 5/8 – 1 inch
Spores: inamyloid, globose 8.5-9 × 7 um Q=1.28

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Hello, Emma. EDITED
By: R. E. Tulloss (ret)
2014-04-26 05:31:35 PDT (-0700)

I have collected A. praecox in GSMNP in the spring. This is the time of year for praecox. It was always with Tsuga canadensis. While it has (apparently) been found infrequently with other conifers, it seems to be with Eastern Hemlock almost all the time. The exception that I know of is a collection made on the Island of Newfoundland. May I have a piece of your collection or borrow it? Do you plan to sequence your material? I remember that Ed Lickey collected this or something very like it several years ago and Dr. Hughes may have nrITS and/or nrLSU sequences from the collection that Ed showed me.

I would not use a phrase suggesting that praecox is close to russuloides because they have very distinctively different spore size/shape.

I don’t use the name russuloides because I am uncertain as to the correct application of the old name and uncertain as to the actual number of distinct taxa that share the known characteristics of russuloides.

I’d like to pursue that question with someone having access to molecular methods. My herbarium includes a goodly number of taxa or possible taxa that seem to me to be close to russuloides as far as the latter is known. As I said, I am not sure how many taxa there really are in that group in eastern North America.

From David Jenkins’ type study of russuloides we do know that it should have predominantly ellipsoid spores.

Very best,


Created: 2013-06-10 11:03:52 PDT (-0700)
Last modified: 2014-04-27 15:06:01 PDT (-0700)
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