Puccinia cyani Passerini, 1874
on Cyanus
Cyanus segetum, Belgium, prov. Antwerp, Mol, 14.v.2019 © Carina Van Steenwinkel
uredinia
urediniospores
urediniospores trapped in an air bubble, better showing the surface ornamentation
urediniospores
telia
teliospores
teliospores
Cyanus segetum, Loenen (Ge.), 18.vi.2013 © Arnold Grosscurt
also the stems are affected
leaf with telia
stem with uredinoid aecia (brown) and telia (black)
gall
No host plant alternation. Spermogonia honey coloured. The first formed uredinia on leaves and stems, later ones only (amphigenous) on the leaves, pulverulent, dark cinnamon brown. Urediniospores spinulose with 2 equatorial germination pores that are not surrounded by a smooth zone. Telia on all parts of the plant, black, pulverulent. Teliospores 2-celled, on a short, fragile pedicel.
host plants
Asteraceae, narrowly oligophagous
centaurea cheirolopha, ensiformis, glastifolia, iberica, lycopifolia, phrygia subsp. salicifolia, polypodiifolia, urvillei, virgata; Cyanus pichleri, segetum, triumfettii & subsp. axillaris.
Also on cultivated cornflowers.
references
Bahçecioğlu & Kabaktepe (2012a), Bahçecioğlu, Kabaktepe & Yildiz (2006a), Buhr (1964b), Dauphin & Aniotsbehere (1997a), Ellis & Ellis (1997a), Gäumann (1959a), Gjaerum (1986a), González Fragoso (1924a), Hafellner (1980a), Henderson (2000a, 2004a), Klenke & Scholler (2015a), Kozłowska, Mułenko & Heluta (2015a), Kruse (2014a, 2019a), Poelt & Zwetko (1997a), Redfern & Shirley (2011a), Riegler-Hager (2007a), Roskam (2009a), Termorshuizen & Swertz (2011a), Tomasi (2014a), Unamuno (1941b), Vanderweyen & Fraiture (2011a), Wilson & Henderson (1966a).