Phragmidium potentillae (Persoon) Karsten, 1879

on Potentilla

Potentilla reptans, Belgium, prov. Namur, Couvin, Aublain © Sébastien Carbonnelle

Potentilla cf argentea, Polen, Bialowieza, ix.2018 © Sébastien Carbonelle: leaf with some telia

underside with telia, a few uredinia

Potentilla argentea, from González-Fragoso (1925a): teliospores

gall

no alternation of host plant. Spermogonia amphigenous, yellow, close to the aecia, between epidermis and cuticula. Aecia amphigenous, orange, up to 1.5 mm, without a peridium but with a circle of hyaline, sausage-shaped curved paraphyses; spores produced in chains, densely verrucose. Uredinia like the aecia, but hypophyllous, spores single, pedicellate, wall finely spinulate. Telia hypophyllous black; spores long pedicellate, elliptic, brown, transversely divided into 3-6 smooth cells, apically gradually tapering to a blunt apiculus.

host plants

Rosaceae, monophagous

Potentilla alchemilloides, anglica, argentea, argyrophylla, aucheriana, aurea & subsp. chrysocraspeda, brauniana, carniolica, caulescens, caulescens, cinerea, x cornazii, crantzii, detommasii, erecta, grandiflora, heptaphylla, hirta, humifusa, inclinata, intermedia, leucopolitana, longifolia, micrantha, montana, multifida, nivea, norvegica, patula, pedata, pensylvanica, pusilla, recta & subsp. obscura, reptans, speciosa, tabernaemontani, thuringiaca.

references

Bahcecioglu & Kabaktepe (2012a), Bahçecioğlu, Kabaktepe & Yildiz (2006a), Blumer (1946a), Buhr (1965a). Dietrich (2016b), Ellis & Ellis (1997a), Gäumann (1959a), Gjaerum (1986a), González-Fragoso (1922a, 1925a), Helfer (2005a), Henderson (2000a), Jage, Klenke, Kruse ao (2016a), Jage, Scholler & Klenke (2010a), Klenke & Scholler (2015a), Korytnianska & Popova (2012a), Kozłowska, Mułenko & Heluta (2015a), Kruse (2014a, 2019a), Llorens i Villagrasa (1984a), Ludwig (1974a), Mułenko, Sałata & Wołczańska (1995a), Negrean (1997a), Petrova & Denchev (2004a), Poelt & Zwetko (1997a), Scheuer & Bechter (2012a), Schmid-Heckel (1985a), Scholler, Reinhard & Schubert (1996a), Termorshuizen & Swertz (2011a), Vanderweyen & Fraiture (2007a), Wilson & Henderson (1966a), Woods, Stringer, Evans & Chater (2015a).