. Fundamentals of botany. Botany. SAPEOPHYTISM AND SYMBIOSIS 339 reason why it is so difficult to transplant many of the heaths; the delicate adjustment between the plant and the mycorrhizal fungus is disturbed in transplanting, and the soil conditions in the new habitat are not fa^•orable to its reestablishment before the plant dies. The Indian-pipe and the false "beech-drops" (Figs. 230 and 231), both belonging to the heath family, also pos- sess endotrophic Fig. 247.—Dodder {Cuscula Sp.), parasitic on geranium. (Pelargonium). A few seedlings at ttie left are still ro
. Fundamentals of botany. Botany. SAPEOPHYTISM AND SYMBIOSIS 339 reason why it is so difficult to transplant many of the heaths; the delicate adjustment between the plant and the mycorrhizal fungus is disturbed in transplanting, and the soil conditions in the new habitat are not fa^•orable to its reestablishment before the plant dies. The Indian-pipe and the false "beech-drops" (Figs. 230 and 231), both belonging to the heath family, also pos- sess endotrophic Fig. 247.—Dodder {Cuscula Sp.), parasitic on geranium. (Pelargonium). A few seedlings at ttie left are still rooted in the soil, and are not yet at- tached to the host-plant. They eventually sever all relation with the soil. 311. Parasitism.—In some cases of symbiosis, as stated above, only one plant derives any benefit from the union, which may or may not be of positive injury to the other. Such is the case with the endotrophic mycorrhizas, already mentioned. There are many instances of the parasitism. 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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