BioImages: The Virtual Field-Guide (UK)

Cronartium flaccidum (Alb. & Schwein.) G. Winter (Scots Pine Blister Rust)

Date 11 September 2013
OS grid ref SU00
Lat/Lon 50° 50' N, 1° 60' W
Location Vice County: Dorset, VC9, England
Voucher 11/09/2013[A]
(Please quote this in any queries about this record)
Stage or state Telia (III)
Record Summary telia, on leaves of Garden Peony
Associated organism: hypophyllous, on spotted leaf of Paeonia mascula
Identification Notes: Leaf-spots: greyish-brown to purplish elongate, often veinlet-limited spots, 3/5 to 5/7mm, eventually coalescing and often turning the entire tip or margin dark and curled or rolled.

Underneath the spot is initially pale green and grows bright orange then whitish telial columns, the leaf spot becoming darker with age.

Telial columns mostly lost by end of September.

Images

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photomicrographs photomicrographs
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