. Fundamentals of botany. Botany. 342 STRUCTURE AND LIFE HISTORIES to grow as parasites on other plants (Fig. 250). The con- dition to success in such experiments is that the osmotic strength of the cell-sap of the host must be less than, or at least not greater than that of the Fig. 250.—Cross-section of a branch of live oals, showing five stems of mistletoe, parasitic on the oak; the upper stem with foliage and fruit. Note the prominent "sinliers" of the parasite, some of them growing laterally for a short distance, close under the surface of the bark, and then radially,
. Fundamentals of botany. Botany. 342 STRUCTURE AND LIFE HISTORIES to grow as parasites on other plants (Fig. 250). The con- dition to success in such experiments is that the osmotic strength of the cell-sap of the host must be less than, or at least not greater than that of the Fig. 250.—Cross-section of a branch of live oals, showing five stems of mistletoe, parasitic on the oak; the upper stem with foliage and fruit. Note the prominent "sinliers" of the parasite, some of them growing laterally for a short distance, close under the surface of the bark, and then radially, deep into the tissue of the wood. 313. Fungal Parasites.—Mention has already been made in Chapter XIV of the parasitism of the entire group of fungi, including the smuts, rusts, and other disease- producing fungi, on flowering plants. The "shelf-fungi," commonly found on forest trees, are economically impor-. 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 Gager, C. Stuart (Charles Stuart), 1872-1943. Philadelphia, P. Blakiston's son & co.
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