Ramularia simplex Pass.


LEAF SPOTS amphigenous, subcircular to angular-irregular, 1-10 mm diam, sometimes vein-limited, yellowish-ochraceous to brown, finally dark to blackish brown, with an indefinite margin or a narrow, dark border.

 


CAESPITULI usually hypophyllous, punctiform, subeffuse, greyish white.


CONIDIOPHORES (cp) in small to moderately rich fascicles, rarely solitary, arising from stromata, emerging through stomata or erumpent through the cuticule, erect, straight, subcylindric to flexuous, geniculate-sinuous, simple, rarely branched, aseptate or 1- septate, longer ones frequently pluriseptate, hyaline, smooth, 10-100 x 2.5-7 µm.

CONIDIA (c) solitary, obovoid, broadly ellipsoid(-subcylindric), hyaline, smooth, aseptate or 1-septate, 12-40 x 5-13 µm; apex broadly rounded, base rounded to somewhat pointed; basal hilum slightly thickened and darkened.

 


PLANT HOST AND DISTRIBUTION. Ramularia simplex attacks different plant species of the genera Anemone, Pulsatilla, Ranunculus, and Trollius (Ranunculaceae) growing in Asia, Europe, and North America (Braun 1998).


REFERENCE

Braun U. 1998. A monograph of Cercosporella, Ramularia and allied genera. Vol. 2. IHW-Verlag.