Urtica dioica, Belgium, prov. Namur, Gembloux, 25.iii.2011 © Jean-Yves Baugnée, det Arthur Vandenweyen

detail with aecia

Urtica dioica, Ommen, de Kleine Wolf, 17.vi.2011 © Arnold Grosscurt : upperside of a gall with spermogonia

underside of a very young gall; the aecia are still closed

Urtica dioica, Neeritter, Vijverbroek, 7.iv.2012

underside of a heavily infested leaf

group of aecia

detail

Urtica morifolia, Canary Islands, la Gomera, 15.ii.2020 © Sébastien Carbonelle

infected leaf, upper side

underside with aecia

gall

spermogonia in small groups on the upper side of the leaf. Aecia hypophyllous, cupulate with a well-developed peridium on strongly galled spots.

spermogonia, aecia

Urticaceae, monophagous

Urtica cannabina, dioica, membranacea, pilulifera, rupestris, urens.

on Carex

gall

uredinia and telia mostly hypophyllous, but also on the leaf sheaths and the stems. Uredinia light brown, telia almost black.

uredinia, telia

Cyperaceae monophagous

Carex acuta, acutiformis, aquatilis, canescens, cespitosa, elata, flacca, hirta, nigra, pallescens, panicea, riparia, rostrata, vesicaria.

synonyms

Puccinia urticae-caricis Klebahn, 1899.

Many authors consider all rusts alternating between Urtica and Carex species one, albeit variable species, urticata. Based on biological differences, and currently also DNA-structure, others see a complex of autonomous species. At the aecial stage they cannot be distinguished morphologically, but at the telial stage they can be distinguished based on the host plant and small morphological differences. The name “urticata” then stands for the entire complex of species.

references

Bellmann (2012a), Blumer (1946a), Brandenburger (1985a), Chinery (2011a), Buhr (1964b), Coulianos & Holmåsen (1991a), Dauphin & Aniotsbehere (1997a), Ellis & Ellis (1997a) Gäumann (1959a), Henderson (2000a), Jage, Kruse, Kummer ao (2013a), Koops (2013a), Klenke & Scholler (2015a), Kruse (2014a, 2019a), Poelt & Zwetko (1997a), Redfern & Shirley (2011a), Schmid-Heckel (1985a), Termorshuizen & Swertz (2011a), Vanderweyen & Fraiture (2011a), Wilson & Henderson (1966a), Woods, Stringer, Evans & Chater (2015a).