LEAF SPOTS amphigenous, subcircular to oblong, 0.5-15 (-30) mm diam, pale to dark brown, finally greyish brown; margin indefinite or with a dark border.
CAESPITULI amphigenous, punctiform, greyish white.
CONIDIOPHORES (cp) in small to moderately rich fascicles, loose to dense, developing from stromata, through stomata, erect, subcylindric to geniculate-sinuous, simple, 5-50(-70) x 2-6 µm, aseptate or sparsely septate, hyaline, smooth.
CONIDIA (c) catenate, sometimes in branched chains, ellipsoid-ovoid, subcylindric, hyaline, smooth to rough, 0-1(-2)-septate, (8.0-)10.0-35.0(-45.0) x 2.0-5.0(-6) µm; ends rounded or slightly narrowed; hila slightly thickened and darkened.
PLANT HOST AND DISTRIBUTION. In Poland, Ramularia didyma var. didyma has been found on Ranunculus bulbosus L. (Adamska, pers. observ.), and R. repens L. (Mulenko 1996) growing in the Slowinski National Park and the Bialowieza National Park, respectively.
According to Braun (1998), this fungus was found to occur on different species of the genera Anemone and Ranunculus (Ranunculaceae) in New Zealand, Asia, Europe, and South and North America.
Braun U. 1998. A monograph of Cercosporella, Ramularia and allied genera. Vol. 2. IHW-Verlag.
Mulenko W. 1996. Parasitic Hyphomycetes of the Bialowieza National Park. III. Acta Mycol. 31, 3-11.