. The botany of crop plants; a text and reference book. Botany, Economic. z^ BOTANY OF CROP PLANTS swollen le<^\ mses 3. Bulbs.—A bulb is an underground stem. The common onion is a typical example. A median, lengthwise section (Fig. 14) of the onion bulb, shows a small, cone-shaped stem upon which are numerous, fleshy leaves that are over- lapping and quite rich in food material. Here, too, there is a terminal bud, and lateral buds occasionally in the leaf axils. Bulbs are vertical stems, thus differing from the horizontal direction of growth of rhizomes. 4. Corms.—A coim is a short, solid,
. The botany of crop plants; a text and reference book. Botany, Economic. z^ BOTANY OF CROP PLANTS swollen le<^\ mses 3. Bulbs.—A bulb is an underground stem. The common onion is a typical example. A median, lengthwise section (Fig. 14) of the onion bulb, shows a small, cone-shaped stem upon which are numerous, fleshy leaves that are over- lapping and quite rich in food material. Here, too, there is a terminal bud, and lateral buds occasionally in the leaf axils. Bulbs are vertical stems, thus differing from the horizontal direction of growth of rhizomes. 4. Corms.—A coim is a short, solid, vertical, under- ground stem. It is typically exemplified in gladiolus. Corms are usually flattened from top to bottom, and bear a cluster of thick fibrous roots at the lower side, and a tuft of leaves on the upper side. Corms are storage organs. 5. Runners (stolons).— These resemble rhizomes in that their direction of growth is horizontal. In the straw- berry plant, the branches that arise from the axils of the closely set leaves are called "; They are slender stems, growing along the ground surface; they have long internodes, and produce leaves, flowers and roots at the nodes. Runners are used as a means of propagating the. stem Fig. 14.—Median lengthwise section of common onion 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 Robbins, Wilfred William, 1884-1952. Philadelphia, P. Blakiston's Son & Co
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Keywords: ., booka, bookcentury1900, bookdecade1910, booksubjectbotanyeconomic
