. Agricultural botany, theoretical and practical. Botany, Economic; Botany. BUDS 37 4. Buds.—The stems and leaves of all flowering plants originate from buds in the manner indicated above; buds may therefore be termed embryonic or incipient shoots. It is by their growth that trees, which appear so bare in winter, become clothed with fresh green leaves in the succeeding spring. The relationship which they bear to the leaves and stems produced by them is easily discerned by examining the structure and watching the develop- ment of the terminal bud of a young sycamore tree (Fig. 16). On the outsi
. Agricultural botany, theoretical and practical. Botany, Economic; Botany. BUDS 37 4. Buds.—The stems and leaves of all flowering plants originate from buds in the manner indicated above; buds may therefore be termed embryonic or incipient shoots. It is by their growth that trees, which appear so bare in winter, become clothed with fresh green leaves in the succeeding spring. The relationship which they bear to the leaves and stems produced by them is easily discerned by examining the structure and watching the develop- ment of the terminal bud of a young sycamore tree (Fig. 16). On the outside is observed a series of scaly leaves, which overlap each other, and protect and cover up the delicate grow- ing point of the twig. A section through the bud (Fig. 12) shows the disposition of these scaly leaves and within are also seen the ordinary leaves (/) arranged upon a very short stem (s). In spring the inner scaly leaves grow for a time (a, Fig. 12. — Longitudinal sec- _. J . tion of a terminal bud of a syca- rlg. 13)) and Ultl-more tree as seen in autumn, a. ^ .. re 1 bud-scales; J rudimentary stem, mately lali Orr, leav- with foliage-leaves /; i lateral 11 1 buds; / pith. mg small scars where they were attached to the twig. The stem (s), which bears the rudimentary green foliage-leaves (/), elongates, and the latter are pushed out from between the protective scaly leaves of the bud (Fig. 13). After a week or ten days, the stem has reached a considerable length, and the leaves, which were rudi- mentary and packed away in the bud, unfold themselves and grow out flat as in Fig. ., -Terminal bud of sycamore, similar to that of Fig. 12, develop- ing in spring, n bud- scales ; / foliage-leaves; d lateral 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 Percival, John, 1863-1949. New York,
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