. Science de la vie végétale, une école botanique le traitement de la plante et de son rapport à l'environnement. La botanique. 2i8 Science de la vie des plantes, bulbes et tubercules à la multiplication végétative de la même manière. Les plantes peuvent se multiplier à partir de l'antenne aussi parties végétatives. Les tiges de la com- monly framboise se courber, et lorsqu'elles touchent le sol, elles forment des racines adventives à partir de laquelle les bourgeons et les nouvelles tiges dressées se développer. Une vigne prendra racine où un nœud entre en contact avec le sol. Balades dans la page (Fig. 134. Feuille d'BryophyUum, avec 383) les pointes de l'IcaVCS dcvclop jeunes pl

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. Science of plant life, a high school botany treating of the plant and its relation to the environment. Botany. 2i8 Science of Plant Life corms, and tubers bring about vegetative propagation in a similar way. Plants may multiply from the aerial vegetative parts also. The stems of the raspberry com- monly bend over, and where they touch the ground they form buds from which adventitious roots and new upright stems develop. A grapevine will take root where a node comes in contact with the soil. In the walking fern (page Fig. 134. BryophyUum leaf, with 383) the tipS of the IcaVCS dcvclop young plants starting! from the , i j_ i notches in the margm. buds, roots, and new plants when in contact with the soil. The strawberry is an example of certain plants, including many grasses, which have horizontal branches (runners) on the soil surface that take root at intervals and produce new plants. In BryophyUum, a weed in cultivated fields of the West Indies, the leaves when they fall to the ground develop new plants from the notches in their margins (Fig. 134). These illustrations, which might be multiplied, show the im- portance of vegetative propagation in the increase and spread of plants. Among wild plants it is entirely possible that vege- tative multiplication is as effective in spreading the plants as is reproduction by seeds. By the former method the young plant is able to start more vigorously than a seedling, because it is able to draw water and food materials from the parent plant until its own root and leaf systems are well developed. Vegetative propagation of cultivated plants. In agriculture and horticulture, vegetative multiplication is relied upon for starting many cultivated plants. Potatoes, mint, horse- radish, sugar cane, sweet potatoes, and certain varieties of. 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 resem

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