ADVENTITIOUS AND ACCESSORY BUDS. 



101 



the regular axillary bud, giving rise to two, three, or more, instead 

 of one ; in some cases situated one above another, in others side 

 by side. In the latter case, which occurs occasionally in the 

 Hawthorn, in certain Willows, in the 

 Maples (Fig. 132), &c., the axillary bud 

 seems to divide into three, or itself give 

 rise to a lateral bud on each side, as 

 soon as or before it penetrates the bark. 

 In the Tartarean Honeysuckle as many 

 as half a dozen buds are developed in- 

 dependently in each axil, one above 

 another, the lower being successively 

 the stronger and earlier produced, and 

 the one immediately in the axil, there- 

 fore, grows in preference ; but when 

 some of the others grow, superposed 

 accessory branches appear. It is much 

 the same in Aristolochia Sipho, ex- 

 cept that the uppermost bud is there Q 

 strongest. So it is in the Butternut 

 (Fig. 133), where the true axillary bud 

 is minute and usually remains latent, 

 while the accessory ones are considera- 

 bly remote, and the uppermost, which 

 is much the strongest, is far out of the 

 axil ; usually this alone developes, and 132 133 



gives rise to an extra-axillary branch. 



154. The stems of those Cryptogamous plants that possess a 

 proper trunk (the Horsetails or Scouring Rushes excepted) do not 

 branch, by the development of axillary or any kind of lateral buds 

 implanted on its surface ; but they often fork at the apex, by the 

 division of the terminal bud. Their ramification, like their whole 

 growth, is merely acrogenous, or from the apex (108). 



155. Excurrent aild Deliquescent Stems, Sometimes the primary 

 axis is prolonged without interruption, by the continued evolution 

 of the terminal bud, even through the whole life of a tree (unless 

 accidentally destroyed), forming an undivided main trunk, from 



FIG. 132. Branch of Red Maple, with triple axillary buds, placed side by side. 

 FIG. 133. Piece of a branch of the Butternut, with accessory buds placed one above an- 

 other : a, the leaf-scar : 6, proper axillary bud : c, d, accessory buds. 



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