Possible Porpidia striata?

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  • November 24, 2024 at 10:31 pm #32942
    John Skinner
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      Could this be Porpidia striata, found on a siliceous stone embedded in peaty soil at the top of the Quantock Hills in Somerset? Apothecia are sessile, the largest ones being about 0.7mm diameter (one was 0.9). Most of the apothecia are striate to some extent although none as beautifully as on the cover of LGBI3 vol.40. The exciple is reddish brown internally with a carbonaceous ‘crust’.

      The hymenium is c.90um and the epihymenium is brown, slightly olivaceous in K and the spores are 14 – 20 x 5 – 5.5 um.

      The thallus is fairly thin and K-, K/UV (wet) -.

      November 25, 2024 at 11:33 am #46374
      AlanFUSA

        Looks OK to me, John. Nice one! The photo on the cover of LGB3 40 is of an exceptionally well developed specimen – most are a lot more like your collection.

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