Frommeëlla mexicana (Mains) McCain & Hennen, 1990
on Potentilla
Potentilla indica, Belgium, prov. Limburg, Kwaadmechelen © Carina Van Steenwinkel
same leaf, underside, with orange uredinia and blackish brown telia
another leaf with only telia
uredinium
telium
teliospores
another example of teliospores
germinating teliospores
Potentilla indica, Nieuwendam: uredinia
urediniospores
spores out of focus, to show the sculpture
gall
Spermogonia and aecia missing. Uredinia orange yellow, hypophyllous, erumpent. Infected leaves are disfigured, boat-like. Telia hypophyllous as well, brown. Teliospores club-shaped, consisting of a row of c. 4 smooth cells, each with one germination pore.
host plants
Rosaceae, monophagous
Potentilla (= Duchesnea) indica.
synonyms
Phragmidium mexicanum (Mains) Yun, Minnis & Aime 2011; Frommeella duchesneae (Arthur) Yohem, Cummins & Gilbertson, 1985; Frommea obtusa duchesneae Arthur, 1934. The references to “Frommea obtusa” on Potentilla indica by Gjaerum (1970, 1982) on Madeira and the Azores probably concern mexicana as well.
references
Beenken & Senn-Irlet (2016a), Fraiture & Vanderweyen (2007a), Gäumann (1959a), Gjaerum (1970a, 1982a), Gjaerum & Dennis (1976a), Gjaerum & Sunding (1986a), Klenke & Scholler (2015a), Kruse (2014a, 2019a), McKenzie (1990a), Mułenko, Piątek, Wołczańska ao (2010a), Poelt & Zwetko (1991a, 1997a), Riegler-Hager (2007a), Scheuer & Bechter (2012a), Spooner & Butterfill (1999a), Termorshuizen & Swertz (2011a), Vanderweyen & Fraiture (2007a), Wołczańska & Piątek (2010a).