

44 



DEPARTMENT OF AGRICULTURE GEORGIA. 



[330] 



growth by the production of seed, or dies 'from injury or 

 disease." 



" In the leaf-bud we find a number of embryo leaves, or 

 leaf-like scales, in close contact with each other, 

 but all attached af the base to a central conical 

 axis (Fig. 5). The opening of the bud consists in 

 the lengthening of this axis, which is the stem, 

 and the consequent separation of the leaves from 

 each other. If the rudimentary leaves of a bud 

 are represented by a nest of flower-pots, the 

 sma.Uer placed within the larger, the stem may 

 be signified by a rope of India rubber, passed 

 through the holes in the bottom of the pots. 

 The growth of the stem may be shown by 

 stretching the rope, whereby the pots are brought 

 away from each other, and the whole combina- 

 tion is made to assume the character of a fully 

 developed stem, bearing its leaves at regular 

 intervals ; with these important differences, that 

 the portions of the stem nearest the root extend 

 more rapidly than those above them, and the 

 stem has within it the material and the mechanism 

 tor the continual formation of new buds, which 

 5. unfold in successive order. 



"In the accompanying cut (Fig. 6), which represents the 

 two terminal buds of a lilac twig, is shown, 

 not only the eKternal appearance of the buds, 

 which are covered with leaf-like scales, imbri- 

 cated, like shingles on a roof; but, in the 

 section, are seen the edges of the undeveloped 

 leaves attached to the conical axis. All the 

 leaves and the whole stem of one summer's 

 growth thus exist in the bud in plan and in 

 miniature. Subsequent growth is but the 

 development of the plan. 

 Fig. 6. " In the flower-bud the same structure is 



O 



vs/ 



