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| Record Summary | epiphyllous back conidiomata of Marssonina state on red spots on leaves of Silverweed |
| Found as | Anamorph |
| Date | 5 August 2010 |
| Associated organism | Potentilla anserina |
| OS grid ref | OSGR: TQ07 |
| Lat/Lon | 51° 30’ N, 0° 30’ W |
| Vice County | Surrey, VC no: 17 |
| Country | England |
| Voucher | 5 Aug 2010[B] (Please quote this in any queries about this record) |
Notes:
Leaf spots: epiphyllous and on underside of midrib, largely hidden below by leaf tomentum; red with dark purple centres, sometimes dead and grey in the centre with dark purple margins; leaf soon turning yellow and dying. Leaf spots with one to several pycnidia in centre, becoming more abundant as infection progresses.
Pycnidia: black, domed, fragile, developing white spore tendril.
Pycnidial shield: becoming almost invisible in lactophenol once the anthocyanin has diffused away.
Conidia: hyaline, curved-fusiform, 22-27/6-7µm, 1-septate with broader lower cell.
The following literature was used to identify this find:
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