. Outlines of botany for the high school laboratory and classroom (based on Gray's Lessons in botany) Prepared at the request of the Botanical Dept. of Harvard University. Botany; Botany. 32 BUDS covered by the margins of the groove. When the leaf falls off in autumn, the base remains as protection to the bud (Fig. ). 36. Store of food. — In trees, the stems which bear the buds are filled wilh abundant nourishment deposited the summer before in the wood and in the bark. buds are supplied from thick roots, root stocks, or tubers, charged with a great store of nourishment for th
. Outlines of botany for the high school laboratory and classroom (based on Gray's Lessons in botany) Prepared at the request of the Botanical Dept. of Harvard University. Botany; Botany. 32 BUDS covered by the margins of the groove. When the leaf falls off in autumn, the base remains as protection to the bud (Fig. ). 36. Store of food. — In trees, the stems which bear the buds are filled wilh abundant nourishment deposited the summer before in the wood and in the bark. buds are supplied from thick roots, root stocks, or tubers, charged with a great store of nourishment for their use. (See Figs. 20, 47, 48.) 37. Renewal of growth.—We see that the on-coming of spring finds plants read}' to resume their interrupted activities, since new shoots are complete in the buds, and food is at hand for their development. As soon as the tide of warmth has fairly set in, therefore, vegetation pushes forth vigorousl}' from such buds, and clothes the bare and lately frozen surface of the soil, as well as the naked boughs of trees, with a covering of green, and. often with brilliant blossoms. Only a small part, and none of the earliest, of this vegetation comes from seed. 38. Nondevelopment of buds. — It never happens that all the buds grow. If they did, there might be as many branches in any j'ear as there were leaves the year before. And of those which do begin to grow, a large portion jjerish, sooner or later, for want of nourishment or for want of light. Id the Hickory (Fig. 17), and most other trees with large scaly buds, the ter- minal bud is the strongest, and has the advantage in growth ; and next in strength are the upper axillary Ijuds ; while the for- mer continues the slioot of the last year, some of the latter give rise to branches, and the rest fail to grow. In the Lilac (Fig. 24). the uppermost axillary b\ids are stronger tljan the lower; but the terminal Imd rarely ap]iears at all; in its place the uppermost pair of axillary buds gTow, and so e
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