Melampsora rostrupii Wagner, 1896

on Mercurialis

Melampsora rostrupii on Mercurialis perennis: spermogonia

Mercurialis perennis, Belgium, prov. Hainaut, Chimay, Baileux, RN Boutonville © Stéphane Claerebout: upperside of leaf with spermogonia

Melampsora rostrupii on Mercurialis perennis: aecia and spermogonia

underside of the leaf

Melampsora rostrupii on Mercurialis perennis: aecia and spermogonia

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

Melampsora rostrupii: uredinia on Populus alba

Populus alba, Flevoland, Reve-Abbertbos © Arnold Grosscurt

Melampsora rostrupii: uredinia on Populus alba

infected leaf, upperside

Melampsora rostrupii: uredinia on Populus alba

underside

Melampsora rostrupii: urediniospores

urediniospores

Melampsora rostrupii: 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 gloublar, 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 discusson under M. pinitorqua.

references

Brandenburger (1985a: 39), 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 & Jage (2014a), Poelt & Zwetko (1997a), Tomasi (2003a), Termorshuizen & Swertz (2011a), Tóth (1994a), Vialle, Frey, Hambleton, Bernier & Hamelin (2011a), Wilson & Henderson (1966).

24/04/2017

mod 18.xi.2017