Plate XVI.
268.—Sandwort Mould.
Peronospora Arenariæ.
269.—Dock Mould.
Peronospora obliqua.
The fearful rapidity with which this method enables them to multiply themselves may account for their widely spreading and devastating power. No other genus of fungi can parallel this in the number of species injurious to the field or the garden, or in which the injuries inflicted are so great and irremediable.
N.B.—Since the foregoing chapter was in type, the Rev. M. J. Berkeley informs us that both Mr. Broome and himself have examined the mould on dock-leaves, to which we have given the name of Peronospora obliqua, and have come to the conclusion that it is truly a member of that genus, and not hitherto described; but they are also of opinion that it is the same mould as one described by Dr. Montagne as Ascomyces Rumicis. We concur with them in thinking it deficient in the important characteristics of Ascomyces, and therefore retain its proposed name of P. obliqua.