. The American florist : a weekly journal for the trade. Floriculture; Florists. Fig. 5. Group of basidia from the young stroma, just prior to llie formation of uredospores. ening at their free ends until a rounded or oval body is developed which becomes light brown in color. The color resides in a thick Spot (Septoria) ouleaves. From a photograph toria. Ward* describes similar haus- toria of Hemeleia vastatrix, the cause of a uredinous coffee tree disease. Figure 6 is from a camera lucida drawing showing the haustoria of Uromyces caryophyllinus in the cells of a carnation stem.
. The American florist : a weekly journal for the trade. Floriculture; Florists. Fig. 5. Group of basidia from the young stroma, just prior to llie formation of uredospores. ening at their free ends until a rounded or oval body is developed which becomes light brown in color. The color resides in a thick Spot (Septoria) ouleaves. From a photograph toria. Ward* describes similar haus- toria of Hemeleia vastatrix, the cause of a uredinous coffee tree disease. Figure 6 is from a camera lucida drawing showing the haustoria of Uromyces caryophyllinus in the cells of a carnation stem. Fig. 6. Cells from the stem of a rusted carnation cellular mycelium and haustoria. Object magniBed the scale. which surrounds and protects the deli- cate living protoplasm within and is covered with numerous minute spines, and is said to be echinulate. These constitute the first form of reproductive over an unfavorable period when the uredospores or the vegetive threads are liable to perish. While the vegetive threads, or mycelium, of the rust course almost ^ exclusively between the cells of the host, they of course derive their nour- ishment from the protoplasm within the cells, thus bringing about the great injury to the carnation plant. The means by which they extract their nutriment from the interior of the cells while they are lying on the exterior is easily seen by making a section across the stem of an affected carnation. The threads lying in the intercellular spaces send out very slender branches, which eat their way through the cell wall and then become swollen into rounded or lobulated sucking organs or haus- showin^ the inter- 30 times more than. 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 American Florists Company. Chicago : American Florist Company
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Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectfloriculture, bookyea
