Geranium pratense, Germany, Dinkelsbühl: telia; © Arnold Grosscurt

detail

Geranium spec., Amstelveen, Thijssepark: telia (and, difficult to find, a tiny uredinium here and there)

twice the same urediniospore

teliospores

Geranium spec. (cult.), Belgium, prov. Limburg, Hasselt, Domein Kiewit © Carina Van Steenwinkel

same leaf, underside

urediniospores

urediniospores, trapped in an air bubble, making the spinulation better visible

urediniosporen en teliosporen

gall

No host plant alternation. Spermogonia amphigenous, orange, darkening later. Aecia orange, at first wart-like, finally dish-shaped, on galled spots of the leaf underside and on the petioles. Uredinia and telia hypophyllous, dispersed over the leaf. Uredinia light brown; spores spinulose, 19-25 x 21-33 µm, 1(-2) germination pores (under the pore the spinulation is weak or absent). Telia dark brown; spores 1-celled, smooth, 15-33 x 15-40 µm; pedicel short, hyaline, deciduous.

host plants

Geraniaceae, oligophagous

Erodium cicutarium; Geranium albanum, albiflorum, argenteum, asphodeloides, atlanticum, bohemicum, cinereum, collinum, columbinum, dissectum, endressii, ibericum, lucidum, maculatum, molle, nepalense, nodosum, palustre, phaeum, pratense, pseudosibiricum, pusillum, pyrenaicum, reflexum, rivulare, robertianum, rotundifolium, sanguineum, sibiricum, sylvaticum, wilfordii.

synonyms

Uromyces kochianus Gäumann, 1933.

references

Blumer (1946a), Brandenburger (1985a), Buhr (1964b), Gäumann (1959a), Gjaerum & Dennis (1976a), González-Fragoso (1925a), Heluta, Hayova, Tykhonenko ao (2010a), Henderson (2004a), Jage, Kruse, Kummer ao (2013a), Jage, Scholler & Klenke (2010a), Klenke & Scholler (2015a), Kozłowska, Mułenko & Heluta (2015a), Kruse (2014a, 2019a), Ludwig (1974a), Marková & Urban (1988a), Mayor (1971a), Mułenko, Sałata & Wołczańska (1995a), Negrean (1996b), Pellicier (2001a), Preece & Hick (1994a), Redfern & Shirley (2011a), Roskam (2009a), Ruszkiewicz-Michalska (2006a), Scheuer & Bechter (2012a), Termorshuizen & Swertz (2011a), Tomasi (2014a), Unamuno (1941a,b), Vanderweyen & Fraiture (2008a), Woods, Stringer, Evans & Chater (2015a).