BioImages: The Virtual Field-Guide (UK)
Melampsoridium hiratsukanum S. Ito ex Hirats. f. (Alder Rust)
||27 September 2007
|OS grid ref
||51° 20' N, 1° 10' W
||Vice County: Berks, VC22, England
(Please quote this in any queries about this record)
|Stage or state
||rust on underside of Alder leaves
||on underside live leaf of Alnus glutinosa
||Dusting of orange hypophyllous uredia covering large parts of the undersides of many leaves. Infected leaves curl upwards.
Uredospores: oblong to clavate, echinulate, 24.5-34/12.5-14µm, echinulate, except the broad end is smooth.