On the Buds and Ramifications of Plants. £41 



Fig. 2, A similar, cut obliquely at the place where the 

 prolongation passes through the wood. 



A, A bud. 



B, The bark. 



C, Ligneous zone of the year. 



D, Herbaceous prolongation of the medullary sheath 

 passing through the wood and entering the bud. 



E, The swelled part of the bark at the sides of the bud. 



F, The pith. 



G, The medullary sheath. 



Fig. 3, The same piece seen in profile, to show the 

 angle of the section. 



Fig. 4, Vertical section of a piece of shumac of two years 

 old, bearing a bud. 



A, The bud produced from an herbaceous prolongation 

 of the medullary sheath, which prolongation has passed 

 through the two ligneous strata. 



Fig, 5, Vertical section of a branched piece of shumac. 



A, The bark. 



B, Ligneous stratum of the second year. 



C, Ligneous stratum of the first year. 



D, Stratum arising from the lignification of the exterior 

 part of the pith. 



E, Medullary sheath of a branch. 



F, Medullary sheath of a twis. 



G, Pith. 



H, Prolongation of the medullary sheath, become lig- 

 neous, and confounded with the wood produced by the 

 pith. 



Fig. C, Vertical section of a branched piece of the pla- 

 tanus occidentalis. ' 



A, Pith. 



B, Medullary sheaths. 



C, Ligneous stratum of the first year. 

 1), Ligneous stratum of the second year. 



I^, Lignified prolongations of the medullary sheath. 



Fig. 7, Vertical section of a piece of hazle, bearing a 

 twig with false wood, which has only one ligneous zone, 

 and which has arisen from a prolongation of the medullary 

 sheath, which prolongation, in order to produce the bud 

 from which the twig resulted, has passed through seven 

 zones of wood, and at length become ligneous.. 



[To be concli^ded in our next.] 



Vol. 22. No. 87. Jugust 1805. Q XXXVL Method 



