[ 127 ] 



23- POLYGAMIA. l6g. 



Monoecia, 22. Gen. White Hellebore, Oracli, 

 Maple. 



Dioecia, 10 Gen. GleditJIa^ Aih-trec, Tupelo. 

 ^rioecia, 2 Gen. Fig-tree, Carob. 



24. Cryptogamia. 657^ 

 Filices, 18 Gen. Horfe-tail, Adders Tongue, Fern. 

 Mufci, 1 1 Gen. Wolfs- Claw Mofs, Goldilocks. 

 Alg^e. 12. Gen. Liverwort, ByfTus, Fucus. 

 Fungi, 10, Agarics, Mufhrooms, Morels. 



App, Palm^. 1 1. 

 9 Gen. Date, Coco-nut, Cabbage-palm. 



The Genera are eftablifhed upon the aflem- 

 blage of all the parts of fru6lification compared 

 together, according to their number^ figure^ pro- 

 portion^ and fttuation. Of thefe we have fpoken 

 before, as they conftitute a large volume in oc- 

 tavo, to which we refer. 



But, befides thefe Natural Characters, or 

 Genera at large, our author has invented, for 

 brevity's fake, two other kinds of chara6i:ers, 

 which he calls Factitious and Essential. The 

 former ferve to diftinguifh each genus from other 

 genera of the fame artificial order only, by enume- 

 rating the moft remarkable differences : thefe 

 greatly facilitate the labour of a young botanift. 

 The essential chara6lers, could they be rendered 

 perfedb, are defigned to diftinguifh the genera from 

 leach other in the natural orders ; but they are not 

 pmplete as yet, except in a few inftances ; and 



poflibly 



