. Practical botany. Botany. BUDS AJSTD BRAJ^CHES 91 82. Nature of the bud and its coverings. A hud is an unde- veloped shoot; or, in other words, a bud is a group of undevel- oped parts which, under favorable circumstances, wiU grow into some kind of stem and leaves. If it is a leaf bud, like the majority of the buds on most forest trees familiar to us, it will grow iato a leafy branch or con- tinue the growth of the main stem at its tip. If it is a. flower bu(J, it will grow into that kind of spe- cialized branch which we call a flower. If it is a mixed hud, it will grow into one or more flow
. Practical botany. Botany. BUDS AJSTD BRAJ^CHES 91 82. Nature of the bud and its coverings. A hud is an unde- veloped shoot; or, in other words, a bud is a group of undevel- oped parts which, under favorable circumstances, wiU grow into some kind of stem and leaves. If it is a leaf bud, like the majority of the buds on most forest trees familiar to us, it will grow iato a leafy branch or con- tinue the growth of the main stem at its tip. If it is a. flower bu(J, it will grow into that kind of spe- cialized branch which we call a flower. If it is a mixed hud, it will grow into one or more flowers and will also develop some ordinary leaves. The scales which cover buds are often dwarfed and otherwise modified leaves or leafstalks, as is well shown in some buckeyes in which the opening buds present a series of gradations between mere scales and foliage leaves (Fig. 73). In other cases, as in oaks, beeches, lindens, and mag- nohas, the scales represent the appendages (stipules') found at the bases of many leaves.^ Fre- quently bud scales are covered with a dense layer of hairs or down, and sometimes, as in the balm-of-Gilead poplar, they are cemented together by a resinous varnish. These coatings on the scales of materials which do not readily conduct heat in- crease their value as a protection against sudden changes in the weather during the colder months. 1 See Kerner-Oliver, Natural History of Plants, Vol. I, pp. 351-353. Henry Holt and Company, New York,. Fig. 73. Dissected bud of sweet buckeye, showing transitions from bud scales to leaves. 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 Bergen, Joseph Y. (Joseph Young), 1851-1917; Caldwell, Otis William, 1869- joint author. Boston, New York [etc. ] Ginn and company
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