Puccinia cardui-pycnocephali Sydow & Sydow, 1902
Carduus bourgeanus, from González Fragoso (1924a): teliospores and two urediniospores
Carduus pycnocephalus: teliospore and an aberrant urediniospore
no host plant alternation, only uredinia and telia. Uredinia dispersed, chestnut brown, pulverulent; urediniospores with 3-4 equatorial pores, each capped by a papilla. Telia also on the stem, dark brown, soon naked. Teliospores two-celled, elliptic, finely echinulate, c. 37 µm long. Pedicel hyaline, deciduous, up to 60 µm.
Asteraceae, narrowly monophagous
Carduus bourgeanus, pycnocephalus, tenuiflorus.
By Gäumann, and possibly on his authority also by Klenke & Scholler, “C. pycnocehalus” is interpreted as C. acanthoides; however, that is a different species.
Brandenburger (1985a), Gäumnn (1959a), González Fragoso (1924a), Klenke & Scholler (2015a), Losa España (1944a), Termorshuizen & Swertz (2011a), Unamuno (1942a).