Melampsora caprearum Thümen 1879

on Larix

gall

see Caeoma laricis.

spermogonia, aecia

Pinaceae, monophagous

Larix decidua, kaempferi, occidentalis .

on Salix

Melampsora caprearum: Salix caprea leaf with telia

Salix caprea, Naardensebos

upperside of the leaf, with subepidermal telia

gall

uredinia and telia > 0.5 mm. uredinia hypophyllous, recognisable at the upperside by yellow spots, up to 3 mm; between the spores capitate paraphyses with a thickened wall; urediniospores 13-15 x 14-21 µm, wall 2-3 µm tick. Telia epiphyllous, subcuticular, confluent to brownish red crusts; wall of the teliosopores apically strongly thickened.

uredinia, telia

Salicaceae, monophagous

Salixaurita, caprea, cinerea.

Much less often S. appendiculata, daphnoides, gmelinii, purpurea, viminalis.

synonyms

Melampsora laricis-caprearum Klebahn, 1897.

notes

Im northern Finland the infection on Salix caprea is systemic, resulting in massive sporulation as soon as the buds unfold (Jalkanen).

references

Adamska (2005a), Brandenburger (1985a: 17, 44), Buhr (1965a), Doppelbaur & Doppelbaur (1973a), Ellis & Ellis (1997a), Gäumann (1959a), Gjaerum (1986a), González-Fragoso (1925a), Henderson (2000a, 2004a), Jage, Klenke, Kruse oo (2016a), Jalkanen (2016a), Klenke & Scholler (2015a), Kozłowska, Mułenko & Heluta (2015a), Kruse & Jage (2014a), Kruse (2014a), Kruse & Jage (2014a), Mułenko, Sałata & Wołczańska (1995a), Negrean (1996b, 1997a), Poelt & Zwetko (1997a), Redfern & Shirley (2011a), Roskam (2009a), Ruszkiewicz-Michalska (2006a), Scheuer & Bechter (2012a), Skuhravá & Skuhravý (2009d), Termorshuizen & Swertz (2011a), Tykhonenko (2010a), Vanderweyen & Fraiture (2007a), Wilson & Henderson (1966a), Woods, Stringer, Evans & Chater (2015a).