. Botany for agricultural students . Botany. CHAPTER X BUDS; GROWTH OF STEMS; PRUNING; PROPA- GATION BY STEMS Buds Nature of Buds. — Buds contain a partially developed portion of a stem with leaves and also flowers, when present, in an em- bryonic state. A close study of buds, like those of fruit trees, shows that the stem portion contained is very short and that the leaves and flowers, although they may be seen with a micro- scope of low power or often with the naked eye, are very rudimentary. Buds are often defined as undeveloped shoots. The most important thing about a bud is that it con- t
. Botany for agricultural students . Botany. CHAPTER X BUDS; GROWTH OF STEMS; PRUNING; PROPA- GATION BY STEMS Buds Nature of Buds. — Buds contain a partially developed portion of a stem with leaves and also flowers, when present, in an em- bryonic state. A close study of buds, like those of fruit trees, shows that the stem portion contained is very short and that the leaves and flowers, although they may be seen with a micro- scope of low power or often with the naked eye, are very rudimentary. Buds are often defined as undeveloped shoots. The most important thing about a bud is that it con- tains the meristematic tissues upon which growth in length (primary growth) and the formation of new leaves and flowers depend. For this reason, when the bud on the end of a branch is removed, the branch can grow no more in length at that point. (Fig- 182.) Buds are common to all plants, but they are most noticeable in perennials, such as o, furry trees which have dormant periods occurring h, outer during the winter season in temperate re- scales;!;, folded leaf;™, gions or during dry seasons in warm coun- apical menstem; r, re- ^^-^^^^ r^^^ ^^^^ ^f ^^^^^ ^^^^^ ^^^ ^^^^^^^ gion to which the scales , • , are attached Modi- ^^ resting buds and are usually covered with fied from Andrews. scales which protect the inner portions from drying and other destructive agencies. The scales overlap, forming a covering of more than one layer, and are often made more protective by becoming hairy or waxy. Bud scales are closely related to leaves and, in most cases, are simply modified leaves. Sometimes, however, they are modified stipules which are leaf appendages. 204. Fig. 182. —Length- wise section through a Hickory bud. inner scales;. 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 Martin, John N. (John Nathan),
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbotany, bookyear1919
