BioImages: The Virtual Field-Guide (UK)

Melampsoridium betulinum (Pers.) Kleb. (Birch Rust)

Date 10 August 2007
OS grid ref SU56
Lat/Lon 51° 30' N, 1° 10' W
Location Vice County: Berks, VC22, England
Voucher 10/08/2007[A]
(Please quote this in any queries about this record)
Stage or state Uredia (II)
Record Summary infection on leaf undersides of saplings/regrowth of Downy Birch
Associated organism: on underside live, spaling leaf of Betula pubescens
Identification Notes: Infection on leaf undersides of saplings/regrowth of Downy Birch in shady corner.

Uredosori: hypophyllous, on small yellow spots.

Uredospores: clavate, sparsely warty, smooth at broad end, 28-41/10.5-14µm. With orange contents. Many white, empty uredospores where they've been eaten by Cecidomyid larvae.

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