108 QUARTERLY JOURNAL. 



under analysis may be found. All the use which Linnaeus designed i 



thus made of his artificial system. The student will be both delightet 



and surprised to find the path so direct and easy to the objeo 



sought. All the difficulties, which arise from the nature of the ol 



jects, will not indeed be made to disappear, but they become less ni 



merous and less formidable. The plants, too, will be studied in thei 



natural relations, associated with their kindred genera and specie 



and in their natural families. Structural Botany is consequent) 



made the basis of the arrangement. The logic and taste will I 



gratified by the systematic method, and the improvement in soni 



of the particulars. A brief synopsis will make this obvious. 



The elementary tissues and compound organs are first presente 

 This leads to the obvious great division of plants, 



a. Flowering or Phenogamous plants, produced from seeds. 



b. Flowerless or Cryptogamous plants, produced from spores. 

 To this division another name may be given from the seeds a: 



spores, the former designating the Cotyledonous, and the latti 

 JlcUyledonous plants. 



The flowering plants are divided into two great natural divisio; 

 Exogens and Endogens. 



1. Exogens, grow by layers or exteriial accretions, bear retu 

 lafed leaves which fall off by an articulation, have discotyledont 

 seeds ; bark, wood and pith separable. 



2. Endogens, grow by internal accretions, bear leaves vr\ 

 parallel veins, have monocotyledonous seeds ; bark, wood and p 

 not separable. 



The Exogens are divided into 



Class I. ^ngeiospermsj having covered seeds, as in the o 

 pink, lilac. 



II. Gymnosperms, with naked seeds, as in the pine, fir, I 



The Endogens are divided into 



Class III. Jlglumaceous^ destitute of glumes or scales, as < 

 chis, Lily. 



IV. Glumaceous^ have glumes or chaff, as the rye, wheat, • 

 all the grasses. 



The Cryptogamous are divided into 



Class V. Acrogens^ grow by extension of their point, as fei 

 mosses, &c. 



