On Saturday 22 October my friend Marie-Claude led an outing to look at lichens at the dolmen (prehistoric standing stone) known as La Pierre Percée near Draché.
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| Magpie Inkcap Coprinopsis picacea (Fr. Coprin pie). Eating this species will give you an upset stomach. It occurs all over Europe, and in parts of Australia. |
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| Looking at the Pierre Percée dolmen. |
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| Looking at the lichens on a Pubescent Oak Quercus pubescens (Fr. chêne pubescent). These are my friends Corinne, Marie-Claude and Danielle. |
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| View of the Vienne Valley from La Pierre Percée. |
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| The dog-tooth lichen Peltigera rufescens, which grows on the ground. It was found by me, so I was especially pleased to learn that it is a new record for the site. |
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| The red on this foliose lichen indicates it has a disease. |
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| Sporodophoron cretaceum, which is always found on oak and looks like snow. It stains yellow when brushed with potassium. |
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| Olive Disk Lichen Lecidella elaeochroma (black) and Lecanora chlarotera (brown) on a sycamore trunk. Olive Disk Lichen is a cosmopolitan species, occurring worldwide. L. chlarotera is described as looking like 'lumpy porridge' and is one of the first lichens to colonise young trees in semi-urban spaces. |
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| Physcia clementei on a sycamore trunk. |
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| Rusty Firedot Lichen Blastenia ferruginea on a sycamore trunk. |
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| Hammered Shield Lichen Parmelia sulcata on a sycamore trunk. This is a globally abundant species, tolerating high levels of pollution. |
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