| BioImages (UK) |
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BIOTA (living things) |
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Eukaryota (eukaryotes) |
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MYCETEAE (fungi, moulds and lichens) |
| Record |
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BioImages: The Virtual Field-Guide (UK)
MYCETEAE (fungi, moulds and lichens)
| Warning: | Identification questionable |
| Date: | 22 April 2007 |
| Location: | Surrey, England |
| Voucher: | 22/04/2007[H] (Please quote this in any queries about this record) |
| State: | Imperfect stage |
| Record Summary: | grey leaf-spots on over-wintered leaves |
| Associated organism: | on live, overwintered leaf of Rhododendron ponticum |
| Identification Notes: | Large leaf-spots, 30-60mm diam., with wavy margin, on over-wintered leaves, usually starting from Vine Weevil damage along the margin or tip, (otherwise perhaps just the extreme centre drops out). Upper surface: greyish-brown, weakly zonate to silver-grey centre, magin double with wavy black inner margin, separated by a pale band from a deep purple outer margin. Under surface: brown, with central zone silver grey, otherwise hardly zonate, border double: narrow (<1mm) dark brown within, 1-1.5mm broad pale or greenish zone, then broader (1-3mm) pale purple outer margin. Pycnidia not seen (appearance confused by Doratomyces stalk bases and hypophyllous punctiform colonies of sooty mildew/fly-speck fungus) Pale punctiform superficial epiphyllous deposits (like extruded spore masses) in the brown zone. These contain cystidia-like cells, often with swollen 1-septate bases, but no spores seen. |
