84 FABRIC OF PLANTS. 



These different layers are usually separated by a 

 thin layer of cellular tissue, which is partially dissolved 

 by steeping in water, when the layers may be sepa- 

 rated ; otherwise this is seldom practicable. 



The soft pulpy mass immediately within this inner 

 layer, I beg leave to term the pulp bark, when it is at 

 any time required to distinguish it. 



This portion of the bark is very important in the 

 economy of vegetation, as will afterwards appear. 



Terms applied to the Rind. 



The rind of plants varies much in the aspect of its 

 surface. Sometimes it is shining ! as if varnished; 

 sometimes smooth and bare, without hair or down 2 ; 

 and again smooth without inequalities 3 . It may also 

 be rough 4 like shagreen ; coarsely rough 5 ; warty 6 ; 

 pimply 7 ; scored or grooved 8 ; furrowed 9 ; glutinous 10 ; 

 or clammy n . 



THE WOOD OF PLANTS. 



THE solid mass of plants which is within the bark, 

 is in trees, shrubs, and other ligneous plants, termed 

 wood 12 . It is composed chiefly of the tissue of fibres 



(1) In Latin, Nitidus. 



(2) In Latin, Glaber. (3) In Latin, Leevis. 



(4) In Latin, Scaber. (5) In Latin, Asper. 



(6) In Latin, Verrucosus. (7) In Latin, PapuloBus, 

 8) In Latin, Striatus. (9) In Latin, Sulcatus. 



(10) In Latin, Glutinosus. (II) In Latin, Viscidus. 



(12) In Latin, Lignum. 



