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| Record Summary | on Yucca leaves |
| Found as | Anamorph |
| Date | 17 April 2010 |
| Associated organism | Yucca |
| OS grid ref | OSGR: SU56 |
| Lat/Lon | 51° 20’ N, 1° 10’ W |
| Vice County | Berks, VC no: 22 |
| Country | England |
| Voucher | 17 Apr 2010[A] (Please quote this in any queries about this record) |
Notes:
Leaf spots on Yucca, in garden.
Leaf spots circular up to 1cm diam, or elliptical and up to 2.5cm long; dark brown with blackish brown margin and yellowish halo when on living leaf. Often weakly concentrically zonate. Centre containing few to many immersed black pycnidia on one side of leaf (ie individual spots epiphyllous or hypophyllous but not both.) The cuticle is raised by the pycnidia and so centre of the leaf spot appears pale. The pycnidia increase in number as the leaf senesces and dies. They are often roughly arranged in concentric circles, those in the centre being larger than the younger ones further out.
On any single area of leaf, the leaf spots generally all have their pycnidia on the same side of the leaf, suggesting it is the orientation of the leaf (or maybe the points of original infection) that drives the side of the leaf where the pycnidia are formed.
Conidia: thick-walled, smooth, mid-brown, subglobose 3.5-5µm diam., to ellipsoid or irregularly angular, 3.5-5/4-5.5µm.
The following literature was used to identify this find:
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