. Class-book of botany [microform] : being outlines of the structure, physiology, and classification of plants : with a flora of the United States and Canada. Botany; Botany; Plants; Plants; Botanique; Botanique; Plantes; Botanique. 42 THE LEAF-nUD. 19?. Nature op the scales. The scaly envelops of tho bud appear to be either the rudimentary leaves or stipules of the preceding year, formed late in the season, arrested in their development by the frosts and scanty nourishment, and reduced to a sear and hardened state. If the bud of tho rose, tulip-tree, or liorse-chestnut be examined when swolle
. Class-book of botany [microform] : being outlines of the structure, physiology, and classification of plants : with a flora of the United States and Canada. Botany; Botany; Plants; Plants; Botanique; Botanique; Plantes; Botanique. 42 THE LEAF-nUD. 19?. Nature op the scales. The scaly envelops of tho bud appear to be either the rudimentary leaves or stipules of the preceding year, formed late in the season, arrested in their development by the frosts and scanty nourishment, and reduced to a sear and hardened state. If the bud of tho rose, tulip-tree, or liorse-chestnut be examined when swollen in the spring, the student will notice a gradual transi- tion from the outer scales to the evident leaves or siipu/^ «7, Bud of currant unfolding,—the scales gradually becoming leaves. 68, Bud of tuHp-tree,—tho scales unfolding into stipules. ^ 198. It is an interesting illustration of designing Wisdom that buds are fur- nished with scales only in wintry climates. In the Torrid Zone, or in conservatories, Where the temperature is equalized through the year, plants develop their foliage into buds immediately after formation, without clothing them in scales. In annual plants also, the buds are destitute of scales, not being destined to survive the win- tor. Hence it is evident that the transformation of autumnal leaves into scales, is a means ordained by the great Author of Nature to protect the young shoots in their incipient stages from sudden cold and moisture,—au office wliich they effect- uaUy fulfil by their numerous downy folds and their insoluble coat of resin. 199. How BUDS ARE PROTECTED. In many trees the bud-seales are clothed with dense, downy hairs. In others, as in the horse-chestnut, balm of Gilead, and other specira of poplar, the buds are covered with a viscid, aromatic resin, resembling a coat of varnish. A considerable quantity may bo separated from a handful of such buds in boiling water. 200. The parent bud. In regard to position, buds are e
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