As in .` the case of the apple disease it forms large irregular blackish blotches on the fruit and leaves, the injury being often very severe especially in a cool, damp season.
In the majority of cases it appears to be pied, showing large blotches of black or brown on a white ground; the head being generally white with large black patches on the sides, most of the neck and the fore-part of the body black, and the hind-quarters white with large coloured blotches.
To the unaided eye the disease is seen as purplish brown or blackish blotches of various sizes, at first on the tips and edges of the leaves, and ultimately upon the leaf-stalks and the larger stems. On gathering the foliage for examination, especially in humid weather, these dark blotches are seen to be putrid, and when the disease takes a bad form the dying leaves give out a highly offensive odour.
The fur has, however, a tawny yellow or reddishgrey ground colour, marked with black spots, aggregated in streaks and blotches, or in elongated rings enclosing areas rather darker than the general ground-colour.
The Oriental poppy (P. orientale) and its several varieties are fine garden plants, having huge bright crimson flowers with black blotches at the base.