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Macrolepiota sp., Brampton Wood

Observed: 16th November 2011 By: martinjohnbishopmartinjohnbishop’s reputation in Fungi and Lichensmartinjohnbishop’s reputation in Fungi and Lichensmartinjohnbishop’s reputation in Fungi and Lichensmartinjohnbishop’s reputation in Fungi and Lichens

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The smell was pleasant but I

The smell was pleasant but I did not notice any difference from the smell of M. procera.
The cap was about 10cm across and the stem about 14cm long. The cap was white with brown scales breaking up into a star shaped pattern at the centre.

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Re: Macrolepiota Andreas

Re: Macrolepiota

Andreas Gminder » Fri Jan 20, 2012 7:52 am

Macrolepiota is a very chaotic and difficult genus, though there are not too many species. But the choice of separating characters are quite different from author to author and the use of the name is even more different.
So it would be easy to say: "This is Macrolepiota konradii". But then next questions will be: "In which sense" ....

VELLINGA, which is seen as THE authority regarding Lepiota s.l., has a very broad concept of Macrolepiota mastoidea/gracilenta and includes M. konradii in this concept. And indeed you not rarely find mastoidea-like Macrolepiotas in pastures with a stellate umbo and few big squales arranged around it. I agree with VELLINGA, that those Macrolepiotas fall within the range of M. mastoidea (s.l.)

But I on the other hand think, that this interpretation of the original M. konradii described by HUIJSMAN is not correct. I think the konradii presented by Fungi of Switzerland is the one that HUIJSMAN ment when describing the species. This taxon has a complex ring and falls therefore in the group of M. procera and not in the mastoidea-group with the simple ring. So I see M. konradii as a "small version" of M. procera, with scales on the cap that usually are few and big and arranged around a star-like discal cap (but this needs not be always so distinct!).

I discussed that different interpretations also with Henk HUIJSER, who worked together with VELLINGA at the Lepiotaceae in the Netherlands. I think that this konradii in my sense (and of FoS) is what the dutch call M. fuligineosquarrosa. But not too sure with that, because I always thought M. fuligineosquarrosa to be a tall species like M. proceera, whereas "my" M. konradii always is a small species (not more then 15 cm diam.) with the attitude of a M. mastoidea(/gracilenta).

I'm not too deep into those Macrolepiotas, so will not defend my concept with all energy. But then I would like to know, what name can be given to the small procera with the scattered scales and the double ring ....

What concerns your foto, so the simple ring, the smooth stipe, and the ratio between stipe length and cap diametre would make me name this one Macrolepiota mastoidea var. rickenii (= M. gracilenta ss. RICKEN). But I admit that the ratio stipe length to cap diametre is the only difference to the stout M. mastoidea var. mastoidea (= M. gracilenta ss. auct. p.p.), and therefore this differentiation is quite dubious.
There are two more supraspecific taxa in this group, which have a girdled stipe like M. procera (but a simple ring!): M. affinis (= M. gracilenta ss. BRESADOLA, CETTO), which has a quite reddish hue in the cap colouration, small scales and the whole cap is somewhat "micaceous" (difficult to describe ...). The pigment in this taxon is exclusively or at least dominantely vacuolar. And last there is M. prominens ss. orig. non MOSER, with no reddish-ochraceous tints (coloration like M. procera) and dominantely parietal pigmentation.

As I have said, I'm not really into those horrible taxa and therefore don't feel to secure about the given concept that I presented also in the "Großpilze Baden-Württembergs".

best regards,