Melampsora amygdalinae Klebahn, 1909
all four spore types are formed without host alternation on the same plant, however, spermogonia and aecia only rarely formed. Spermogonia orange, subcuticular. Aecia mostly hypophyllous, also on young shoots, orange, dish-shaped, up to 1 mm. Uredinia similar, but with paraphyses; urediniospores elliptic, 11-15 x 19-32 µm, spinulose, but with a smooth apical region. Telia also hypophyllous, subcuticular, brownish black, in small groups delimited by the venation of the leaf.
Salicaceae, narrowly monophagous
Rarely also on S. pentandra.
Infected plants show a considerale leaf fall, the growth is stunted and young stems produce cankers (Wilson & Henderson).
Brandenburger (1985a: 44), Buhr (1965a), Ellis & Ellis (1997a), Gäumann (1959a), González-Fragoso (1925a), Henderson (2000a), Jage, Kruse, Kummer ao (2013a), Klenke & Scholler (2015a), Kozłowska, Mułenko & Heluta (2015a), Kruse (2014a), Negrean (1996b), Poelt & Zwetko (1997a), Redfern & Shirley (2011a), Roskam (2009a), Savchenko, Heluta, Wasser & Nevo (2014c), Savchenko, Wasser, Heluta & Nevo (2019a), Termorshuizen & Swertz (2011a), Tomasi (2014a), Tykhonenko (2010a), Vanderweyen & Fraiture (2007a), Wilson & Henderson (1966a), Woods, Stringer, Evans & Chater (2015a).