BioImages: The Virtual Field-Guide (UK)
Melampsoridium betulinum (Pers.) Kleb. (Birch Rust)
||10 August 2007
|OS grid ref
||51° 30' N, 1° 10' W
||Vice County: Berks, VC22, England
(Please quote this in any queries about this record)
|Stage or state
||infection on leaf undersides of saplings/regrowth of Downy Birch
||on underside live, spaling leaf of Betula pubescens
||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.