PHITOGENY. 221 



position than in the sheath or angle of a leaf. Every 

 succeeding leaf upon the twig is in the same manner a 

 ruptured vesicle of tracheae. As many leaves therefore 

 originate as there are tracheal zones present. 



1108. Every branch is an entire plant. All the tis- 

 sues and systems are found in it. Tracheae free them- 

 selves from the stalk, pass towards the circumference, 

 break through the bark and carry with them the liber, 

 whose external layer again becomes bark. The branch 

 is only an elongated bud. The stalk is the soil or the 

 root of the branches. Branches, that have been cut off 

 and stuck in the earth, grow. There is nothing contra- 

 dictory, in the tracheal fascicles of the branch growing 

 downwards into the stalk. A branched tree is a complete 

 wood. 



1109. From the same cause, or by the influence of water 

 on different situations in the earth, the root has branches. 

 But as this influence is weaker than that of air and light, 

 so the number, density, and length of the roots is less. 



1110. The polarization of the tracheal fascicles into 

 branches takes place all around the stalk in one situation. 

 The influence is equal upon all sides. The idea of the 

 formation of branches is the star. All branches have a 

 radiate position around the stalk all form a verticillum 

 or whorl. 



1111. Every other position of branches is only an 

 alteration of the verticillate arrangement. 



1112. In most plants the arrangement of the branches 

 admits of being reduced to the spiral line. This position 

 is only the verticil drawn out. 



1113. This drawing out takes place through the con- 

 tinued growth of the stalk, in which the bundles of tra- 

 cheae, doubtless by the varied operation of light, develop 

 themselves in order, become individualized, and issue 

 from the stalk as branches. 



1114. The crucial position of the branches depends 

 upon the same growth of the stalk, but one in which 

 transverse polarities are present. The irregular or dis- 



