. Descriptions of new species of fungi. Fungi. -5—. Fleure 2—Summer or Uredo spores of the rasp- berry rust, Phragmidium rubi-idxi. Spore clus- ter ^iirrouuded by club-shaped sterile bodies paraphyses. (After Winter.) gones are absent and the spores are borne on stalks, from which they easily fall, instead of being in chains. It is found that later in the sea- son blackish winter spores follow each of these forms and serve to propagate the disease from year to year. The one on raspberries is Phragmidium rubi-idcei (Pers.) Wint., and that on blackberries is Pharagmidium rubi (Pers.) Wint., the
. Descriptions of new species of fungi. Fungi. -5—. Fleure 2—Summer or Uredo spores of the rasp- berry rust, Phragmidium rubi-idxi. Spore clus- ter ^iirrouuded by club-shaped sterile bodies paraphyses. (After Winter.) gones are absent and the spores are borne on stalks, from which they easily fall, instead of being in chains. It is found that later in the sea- son blackish winter spores follow each of these forms and serve to propagate the disease from year to year. The one on raspberries is Phragmidium rubi-idcei (Pers.) Wint., and that on blackberries is Pharagmidium rubi (Pers.) Wint., the names being determined by the winter spores. The yellow or summer spores of the two kinds differ but little from each other, but the form on blackberries is a little the more conspicuous. The winter spores are long, cylindrical, nearly black and tipped with a sharp point. The kind on blackberries is finely warty and divided by cross partitions into five or six cells; that on rasp- berries is coarsely warty and divided into seven to nine cells. In this region the black raspberries are seldom at- tacked, but the red ones, especially in a wild state, quite commonly. The cultivated varieties of the red, Turner, Brandywine and Cuthbert, are reported to have suffered seriously from this disease at Jacksonville, Illinois. The yellow spores come in August or September and the black ones soon follow. On the blackberry, the yellow spores come somewhat later, and the black ones have seldom been seen in this 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
