Home Forums HELP WITH ID’s Small black spots on Typha

This topic contains 4 replies, has 3 voices, and was last updated by  Dominique C 3 years, 5 months ago.

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  • #1623

    John R
    Keymaster

    Please find an image taken below of some Typha with several things growing on it.

    For starters, has anyone got any idea what the small black spots (species A) could be?

    I have had a look in Ellis and Ellis but not turned up anything that matches. Any help/suggestions appreciated.

    Species A: Small black spot Squash x 400

    Species A: Small black spot squash x 1000 (unstained)

     

    Species A: Small black spot squash x 1000 (lactophenol blue) – cropped. Hyaline spores Me = 5.8 x 1.4 µm

    ——————-Species B: LARGER BLACK SPOTS GAVE DARK SPORES BELOW ——————

    Species B: The larger black spots produced the following coloured spores – Me = 12.9 x 3.5 µm ; Qe = 3.7. Likewise, any suggestions appreciated.

    Larger_Black_spot_typha x1000_2_800

  • #1635

    Tom Kirby
    Moderator

    Something seems wrong ‘ere. The spores look like Dasycyphella nivea but the little black spots don’t compute. No idea 🙁
    Best,
    Tom

  • #1636

    Tom Kirby
    Moderator

    …also, can we assume these spores are hyaline and not black (ish)?

  • #1637

    John R
    Keymaster

    Species A. Small black spot spores (hyaline) Me = 5.8 x 1.4 µm

    Species B. Larger black spot spores (dark) Me = 12.9 x 3.5 µm

    Below is a comment from CA – thanks.

    “However, the larger one is a bit more distinctive in having pigmented spores and looks like it might be an Anthostomella. I had a look in Ellis and Ellis and it mentions A. limitata but the spore shape looks wrong. You’re then have the task of checking all the other Anthostomellas (or allied genera) to see which one fits best.

    The smaller one looks like it might be a Coelomycete rather than an Ascomycete; in other words, an asexual fungus with conidia. However, haven’t got any further than this. “

  • #1754

    Dominique C
    Moderator

    Hi John, thank you for your time, effort and the great spore pics plus associated info. As discussed, Hymenopsis typhae in E&E fits the larger of the two species very well.

    Your link http://www.asturnatura.com/fotografia/setas-hongos/hymenopsis-typhae-fuckel-sacc/4401.html shows examples which have not ‘opened’. This link http://www.ascofrance.com/recolte/2558/coelomycetes-hymenopsis-typhae is a little more in keeping with the illustration in E&E and the pics below. All of the references are consistent when it comes to the conidia.

    First pic shows examples yet to ‘open’, the second some ‘open’ with a ‘groove’.
    This collection was made July 13th 2014 just north of Newton Stewart NX4068 VC73 (first Scottish record?).

    Unless someone wishes to make another suggestion I am inclined to record it as Hymenopsis typhae. Only 24 records in BMS database and 10 on CATE2 (mostly recorded by the Ellis family), neither has a record for Scotland (how fortuitous you mentioned the asco course)!

    I haven’t given up on the little one yet.

    Cheers

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