Pucciniastrum pyrolae Dietel, 1907
on Pyrola, etc.
Pyrola rotundifolia, from González-Fragoso (1925a): section through uredinium. The layer of thick-walled cells below the epidermis is the actual outer wall of the uredinium: the peridium
spermogonia and aecia unknown. Most uredinia hypophyllous, with a red discoloration of the corresponding upper side of the leaf. They measure less than half a mm; they rupture the epidermis, but then are still covered by a peridium, with a central pore. The peridial cells around the pore have a strongly thickened wall, and are spinulose above. Telia hypophyllous, inconspicuous; spores formed intracellularly in the leaf tissue.
Ericaceae, narrowly oligophagous
Blumer (1946a), Buhr (1965a), Dietrich (2013a), Doppelbaur & Doppelbaur (1968a), Ellis & Ellis (1997a), Gäumann (1959a), González-Fragoso (1925a), Henderson (2000a), Klenke & Scholler (2015a), Llorens i Villagrasa (1984a), Maier, Begerow, Weiß & Oberwinkler (2003a), Redfern & Shirley (2011a), Schmid-Heckel (1985a), Termorshuizen & Swertz (2011a), Vanderweyen & Fraiture (2007a), Wilson & Henderson (1966a).