Beige small fungus with slightly decurrent gills - Clitocybe sp

Es gibt 4 Antworten in diesem Thema, welches 362 mal aufgerufen wurde. Der letzte Beitrag () ist von Steve_mt.

    Found attached to decaying twigs of a carob tree in a shaded and humid environment. Spore print white. No particular odour, taste bitter, unpleasant.

    I was thinking on Clitocybe rivulosa but this grows on grass.


    I haven't see cheilocystidia (if present rare and not detected)



    Spore Details:


    Spore length: range 3.9 - 5.7 µm
    Spore length: mean 4.6 µm
    Spore width: range 2.9 - 4.2 µm
    Spore width: mean 3.4 µm
    Spore Q factor: range 1.2 - 1.8
    Spore Q factor: mean 1.4
    Spore shape Elliptical with a small apiculus
    Amyloid reaction Inamyloid, (and doubtfully mildly dextrinose)
    Spore surface Smooth of finely rough texture (few wide, plug-shaped and wart-like projections observed but are considered as artifacts)
    Apiculum Present and conspicuous
    Oil bodies Oil bodies not conspicuous
    Remarks Weak stain in congo red, hence spores not congophilous

    Hello Steve,

    I consider this as a Clitocybe, too. Unfortunately there is no good literature on Clitocybe, especially on Clitocybe species in Malta.

    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!

    Yes I know, so I am doing my best to document what I am finding with my limited resources. I often send samples for ITS sequencing but I have to limit the samples as much as possible because I pay everything myself. For Clitocybe, I am using Flora Agaricina Neerlandica Vol3 - I dont' know if there are better / updated sources on the genus.


    For this one in particular:


    1. Hygrophanous: YES

    2. Has pruinosity (aeroferous covering sensu Flora Agaricina Need.) yes but limited at the margin ? border line yes/no

    3. Spore print white / Lamella White

    4. Spores 4-5.5 um, broadly ovoid

    5. Smell indistinct (taste bitter)

    5. Lamella very crowded ? I don't know!

    6. Stipe short? Yes


    Following the Key,

    if we consider the specimen pruinose it would key best as C. rivulosa

    if we consider the specimen pruinosity limited to the margin, it would key best as C. diatreta (although this is said to have a cream spore print).



    Reading further FAN3 , it says that C. diatreta has spores that are congophilous whereas C. rivulosa are not congophilous (as were in this specimen). Spore size matching slightly better rivulosa too. The habitat of rivulosa is grassy but sometimes on wood, that of dealbata is more woody in mossy or grassy ground, so the habitat goes a bit in favour to diatreta.... but overall within the species list and descriptions of the FAN3 key, I see it more rivulosa. If there are other species to consider, I don't know!








    I bumped into this species: Clitocybe truncicola, let's see how much it matches...


    Clitocybe truncicola - A.M.B. PESARO
    Genere Clitocybe Specie truncicola (Peck) Sacc. Posizione sistematica: Ordine Agaricales, Famiglia Tricholomataceae.  Sottogenere Disciformis, Sezione…
    www.ambpesaro.it


    Trunk funnel (Clitocybe truncicola) - mushrooms of Eastern Texas

    For those who are following this thread, after considering everything, I am labelling this collection as C. truncicola


    The woody habitat, smaller sporocarp, no conspicuous rhizoids at the base of the stem, and somewhat broader spores (amongst other things) contributed to this decission. C. rivulosa is a grass-loving species which has rhizoids at the stipe, more densely pruinose and overall whitish and tends to be medium-sized (my specimen ca. 2 cm across, 3.5cm tall).


    The congophilous reaction on the spores mentioned by Flora Agaricina Need.was interesting and I wonder if it really useful for determining clitocybe sp. (in this case this sp was not congophilous and hence do not stain much with Congo Red)


    Clitocybe truncicola