. Plant physiology. Plant physiology. 290 PHYSIOLOGY OF GROWTH AND CONFIGURATION zomes. many other external conditions, besides those here mentioned. Aerial tubers may be similarly produced on other plants that usually bear subterranean tubers.' Because of their position in the soil, rhizomes or root-stocks, which are of frequent occurrence in plants, are often thought to be roots, but they are really subterreanean stems, for they possess dormant buds that may develop later into aerial branches. Vochting^ has shown experimentally that this is true for Stachys tuberifera and Siachys palustris,
. Plant physiology. Plant physiology. 290 PHYSIOLOGY OF GROWTH AND CONFIGURATION zomes. many other external conditions, besides those here mentioned. Aerial tubers may be similarly produced on other plants that usually bear subterranean tubers.' Because of their position in the soil, rhizomes or root-stocks, which are of frequent occurrence in plants, are often thought to be roots, but they are really subterreanean stems, for they possess dormant buds that may develop later into aerial branches. Vochting^ has shown experimentally that this is true for Stachys tuberifera and Siachys palustris, both of which have imderground rhi- Aerial rhizomes may be obtained with these plants by the same treat- ment as was employed to bring about the development of aerial tubers in the potato. If- all the buds are removed from the basal portion of a cut leafy branch and this por- tion of the stem is then placed in soil, roots develop but no under-ground rhi- zomes are formed, there being no buds on the underground portion of the stem, from â which rhizomes migh t arise. Under these conditions rhizomes do develop, however, from axiUary buds on the upper portion of the stem, thus replacing the usual. 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 Palladin, Vladimir Ivanovich, 1859-1922; Livingston, Burton Edward, 1875-; Hopping, Aleita, 1890-. Philadelphia, P. Blakiston's Son & Co
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