. Descriptions of new species of fungi. Fungi. -6—. Figure 4—Leaf of currant showing diseased spots. A CURRANT DISEASE. In Western Massachusetts last summer (1885) the currant bushes were badly injured by a fungus (Septoria ribis, Desm.) growing on the leaves. The same occurs in this region on wild currants and goose- berries, on the cultivated currant in Ohio, and on gooseberries in Ken- tucky. The disease appears as brown spots on the leaves, angular spots limited by the veins and soon becoming dead and drv. The spots are good sized and when large or numerous, destroy nearly the whole leaf.
. Descriptions of new species of fungi. Fungi. -6—. Figure 4—Leaf of currant showing diseased spots. A CURRANT DISEASE. In Western Massachusetts last summer (1885) the currant bushes were badly injured by a fungus (Septoria ribis, Desm.) growing on the leaves. The same occurs in this region on wild currants and goose- berries, on the cultivated currant in Ohio, and on gooseberries in Ken- tucky. The disease appears as brown spots on the leaves, angular spots limited by the veins and soon becoming dead and drv. The spots are good sized and when large or numerous, destroy nearly the whole leaf. It certainly has an exhausting effect on the leaf and many leaves beeome entirely exhausted and fall off. The microscope shows the presence of a fungus growing among the leaf tissues in the usual way, but its mode of fruiting is quite different from those described before. Within the tissues and somewhat pro- truding on the surface are minute blackish postules or spore-cases (perithecia). At the base of the perithecia, within, arise threads which bear the spores. The spores are colorless, very slender and thread-like, curved, pointed at the free end. The life history of this fungus is unknown, but it is known that many of this group are only Figure 5—spore of currant the summer stages of species which live through the winter and mature in late winter or spring, either on the same spot with the summer form, as in the black knot of the plum trees, or on different parts where the summer spores have. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Peck, Charles H. (Charles Horton), 1833-1917. [Buffalo, N. Y. : Buffalo Society of Natural Sciences]
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectfungi, bookyear1890
