Fungus – Paxillus obscurisporus

20140907 - Fungus1 These fungi are growing in grassland (both mown and un-mown) near the Meteorology Department. Most of them are under lime trees but there are also some under an oak tree about 10 metres away.

In size they varied from 8 to 20 centimetres across.

Thanks to Geoffrey Kibby of the British Mycological Society we have the following identification notes: This is most likely Paxillus obscurisporus, fairly common under trees in open situations, much larger than P. involutus which is a woodland species and P. obscurisporus also has a darker, vinaceous-brown spore deposit. The other possibility is P. ammoniavirescens which also likes open areas but that species turns bright green on the cap when a drop of ammonia is applied

20140907 - Fungus2

Brown spores cover the clover leaves beneath the fruiting body.

About Fay Newbery

PhD student in the Plant Pathology Research Group.
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One Response to Fungus – Paxillus obscurisporus

  1. Oliver Ellingham says:

    I have referred it to the BMS Fay: could be Paxillus involutus

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