True Fungi (unidentified), (unidentified true fungi)

22 Apr 2007 at OSGR: SU83 in Surrey, England

Record Summarygrey leaf-spots on over-wintered leaves
Found asAnamorph
Date22 April 2007
Associated organismRhododendron ponticum
OS grid refOSGR: SU83
Lat/Lon51° 10' N, 0° 40' W
Vice CountySurrey, VC no: 17
Voucher22 Apr 2007[H]
(Please quote this in any queries about this record)

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.


Click on a thumbnail to see the preview, then click on that for the full-sized image

Creative Commons License
This website is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International Licence.

Unless otherwise expressly stated, all original material on the BioImages website by Malcolm Storey is licensed under the above Creative Commons Licence.

Photographs from other photographers are used with permission but not included under the above CC licence.

BioImages - Virtual Field-Guide (UK)