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Il6. FUNDAMENTUM FrUCTIFICATIONIS, 



y, M, Grab erg. 1762. 



Having briefly dated th« improvement of bo- 

 tany, and defined it as a fcience, M. Graherg 

 proceeds to the explanation of his term. Under 

 the word Fru5iification^ he includes not merely the 

 Corolla^ Pericarpium^ and Semina^ fimply confider- 

 ed, as Tournefort had done, but alfo the Calyx^ 

 Ne5iarium^ Stamina^ and Pijlilla, All thefe parts, 

 therefore, conftitute the organs oi fr unification^ and 

 on which x}:^^ foundation of all true fyftem mull be 

 laid. He then briefly traces the rife of fyftem from 

 Gefner^ through the improvements of C^efalpinuSy 

 Columna, Morifon^ and Tournefort^ down to Lin- 

 naeus, who, by defining, as above, the parts of 

 frudification, firft laid the bafis of true generical 

 diftinctions. He then inlarges on Jpecifical dif- 

 tindlions, and fhews what conftitutes varieties in 

 plants. He proceeds to confider the generation 

 of hybrid plants, concerning which he favours the 

 opinion laid down in the Generatio Ambigena^ N* 

 10 1 of this colledlion j that the internal ftruc- 

 ture, or parts of frudtification in hybrid plants, 

 refemble the impregnated plant, and the habit, or 

 external parts, that which furniflied the farina 

 fcecundans, A Angular inftance of this kind is 

 broughtfrom xhtVerbafcum genus. Finally, he pro- 

 pofes a queftion, whether all the fpecies may not 

 have fprung from one original in each genus^ by hy- 

 brid impregnations. He thinks the contempla- 

 tion of the numerous fpecies, under many African 



and 



