Melampsora rostrupii Wagner, 1896
on Mercurialis
Mercurialis perennis, Belgium, prov. Hainaut, Chimay, Baileux, RN Boutonville © Stéphane Claerebout: upperside of leaf with spermogonia
underside of the leaf
detail: spermogonia surrounded by a circle of aecia
gall
Aecia pulvinate (not cupulate).
spermogonia, aecia
Euphorbiaceae, narrowly monophagous
Mercurialis ovata, perennis.
Not on M. annua.
on Populus
Populus alba, Flevoland, Reve-Abbertbos © Arnold Grosscurt
infected leaf, upperside
underside
urediniospores
another image
gall
uredinia hypophyllous, on leaf spots that are developed at both sides of the leaf, 0.1 mm, yellow, pulvinate. Throughout the uredinium stand paraphyses on a thin stem that rather gradually widens into a club-like head with uniformly strongly thickened wall. Urediniospores almost globular, with spines all over; wall of uniform thickness. Telia 0.5 mm, often in groups, dark brown, subepidermal; teliospores columnar.
uredinia, telia
Salicaceae, narrowly monophagous
Populus alba, x canescens, tremula.
synonyms
see the discussion under M. pinitorqua.
references
Brandenburger (1985a: 39, 343), Doppelbaur & Doppelbaur (1968a), European and Mediterranean Plant Protection Organization (2009a), Gäumann (1959a), González-Fragoso (1925a), Jage, Klenke, Kruse oo (2016a), Jage, Kruse, Kummer ao (2013a), Jage, Scholler & Klenke (2010a), Klenke & Scholler (2015a), Kruse (2019a), Kruse & Jage (2014a), Poelt & Zwetko (1997a), Tomasi (2003a), Termorshuizen & Swertz (2011a), Tóth (1994a), Vialle, Frey, Hambleton ao (2011a), Wilson & Henderson (1966).