Agaricus sp. with foetid scent

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    I found fruiting bodies of Agaricus sp. on leaf litter and twigs below Pomegranate trees in a shaded and humid place. Slicing or bruising did not produce any significant colour change. The scent was interesting as it was slightly foetid (like millipedes) and I am usually used to scents of anise, ink, mealy, or good-scented mushroom scents with Agaricus sp. The ring was not well developed. The spore print was moderate brown (not dark) like, milk-chocolate. The spores were small with an eccentric apiculum. The cheilocystidia were hard to see, and if what I seen are Cheilocystida, they were clavate with large vacuoles. Basidia 2- 3- and 4- sporous. Under the stereomicroscope I saw glistening white elements on the sides of the lamella which may be pleurocystidia.



    Spore size:

    (6.4) 6.6 - 7.6 (8.1) × (4.9) 5.2 - 5.9 (6.1) µm

    Q = (1.1) 1.2 - 1.36 (1.4) ; N = 36

    Me = 7.1 × 5.5 µm; Qe = 1.3

    Hello Steve,


    Agaricus should be safe, according to the form an colour of spores.


    Now, you have to find out the right section/subgenus. For this, there is KOH-Test on Pileipellis (reaction nil or yellow), as well Schaeffer-Test (paint a cross on pileipellis by one line with HNO3 and the other with Anilin, the middle of the cross will be striking orange when Schaeffer-reaction is positive). Then you go into the right section. But then the difficulty begins.


    Greets

    Oehrling

    PSVs dürfen weder über I-Net noch übers Telefon Pilze zum Essen freigeben - da musst du schon mit deinem Pilz zum lokalen PSV!

    Einmal editiert, zuletzt von Oehrling ()

    Zitat von Oehrling

    Then you go into the right section. But then the difficulty begins.

    Let's put it this way: That's where the trouble starts rather than the difficulties.


    Cheers

    Marcel

    »Experts do not exist,

    we all are beginners

    with greater or lesser knowledge.«

    Luis Alberto Parra Sánchez


    Gnolmokratisches:

    100 PCs Startkapital - 4 PCs (2023 an Boletaceae bei KiZaRü/Psathyrella-Challenge verloren) u. - 21 PCs (2024 an Schwarzhex hilmgridd gespendet) = 75 PCs in stock

    There was a very mild (or negligible) colour change with 5% and 10% KOH on the cap, but the sample is now 3 days old (but should still work).


    I do not have the other Aniline and Nitric Acid (what concentration the acid should be ? )





    Concentration of HNO3: as fat as available. When I open my bottle with HNO3, it smokes.


    I consider the KOH reaction as negative. Therefore, according to KIBBY, The Genus Agaricus In Britain, it's neither a Minores nor an Arvensis nor a Xanthodermatei. When Schaeffer reaction should be positive, it's a Bohusiae or a Spissicaules. When Schaeffer should be negative, it's an Agaricus, a Bivelares, a Chitoinoides or a Sylvatici.


    FG

    Oehrling

    PSVs dürfen weder über I-Net noch übers Telefon Pilze zum Essen freigeben - da musst du schon mit deinem Pilz zum lokalen PSV!

    Hi Steve

    Zitat von Steve_mt

    I do not have the other Aniline and Nitric Acid (what concentration the acid should be ? )

    Since handling aniline and nitric acid can be quite problematic, as the substances are dangerous and toxic, I use sulfanilic acid instead, as described here (unfortunately only in German):

    https://www.dgfm-ev.de/jugend-und-nachwuchs/pdf-bereiche/pilzkunde?name=Chemie-mit-Pilzen-A-v2.pdf&reattachment=d56d8b505b8d77ca529c0fb6dcb6191b

    (Since the links are still not working properly, I have attached it as a PDF.)


    As far as I know, it should have the same effect and be far less problematic.


    Kind regards,

    Benjamin

    Dateien

    chemie-mit-pilzen-a-v2.pdf 263,02 kB – 21 Downloads

    Mit meinen Beiträgen gebe ich lediglich meine persönliche Einschätzung/Meinung ab. Sie sind nur als Vorschläge zu werten und es gibt damit insbesondere keine Verzehrsfreigaben meinerseits. Eine sichere Bestimmung sowie Verzehrsfreigabe kann nur der Pilzkontrolleur bzw. Pilzsachverständige vor Ort geben.