Uromyces trifolii (Hedwig) Léveillé, 1847
on Trifolium

Trifolium arvense, from González-Fragoso (1925a): urediniospores and teliospores
gall
No host plant alternation, only telia. They are dark brown, hypophyllous, on galled spots of the veins and petioles. They are one-celled, (almost) smooth, with a small apical papilla; the pedicel is short and thin, deciduous.
host plants
Fabaceae, monophagous
Trifolium alexndrinum, alpestre, ambiguum, angustifolium, arvense, aureum, campestre, dasyurum, dubium, echinatum, fragiferum, glomeratum, hirtum, hybridum, incarnatum, montanum, nigrescens, ochroleucon, pallescens, pannonicum, pratense, repens, resupinatum, rubens, thalii, tumens.
synonyms
According to Klenke & Scholler the name U. trifolii is often used as a collective concept denoting any Uromyces on clover. In most cases the intended species will be U. flectens.
references
Afshan, Khalid & Niazi (2012a), Bahçecioğlu & Kabaktepe (2012a), Bahçecioğlu, Kabaktepe & Yildiz (2006a), Blumer (1946a), Brandenburger (1972a, 1985a: 318), Buhr (1964b, 1965a), Doppelbaur & Doppelbaur (1968a), Ellis & Ellis (1997a), González-Fragoso (1925a), Henderson (2000a, 2004a), Koops (2013a), Kozłowska, Mułenko & Heluta (2015a), Kruse & Jage (2014a), Losa España (1942a), Melgarejo Nárdiz, García-Jiménez, Jordá Gutiérrez ao (2010a), Poelt & Zwetko (1997a), Redfern & Shirley (2011a), Savchenko, Heluta, Wasser & Nevo (2014e), Termorshuizen & Swertz (2011a), Tomasi (2012a, 2014a), Tóth (1994a), Unamuno (1942a), Vanderweyen & Fraiture (2008a), Wilson & Henderson (1966a), Woods, Stringer, Evans & Chater (2015a).