TO BOTANY. gi 



ORDER I. POLYGAMTA AEQUALIS, comprehend- 

 ing such plants as have compound flowers, of which 

 the florets are all hermaphrodite. This order con- 

 tains forty-three genera, distinguished into 1. Such as 

 have all the florets ligulate (the semifloscuiosi of 

 Tournefort ;) of which there are nineteen, viz. Scoly- 

 mus, Cichorium, Catananche, Seriola, Hypochaeris, 

 Geropogon, Andryala, Tragopogon, Picris, Leonto- 

 don, Scorzonera, Crepis, Chondrilla, Prenanthes, 

 Lactuca, Hieracium, Sonchus, Lapsanaand Hyoseris. 

 2. Those with globular heads; of which there are 

 eleven, viz. Atractylis, Barnadesia, Stockesia, Car- 

 lina, Cnicus, Arctium, Carthamus, Cynara, Carduus, 

 Onopordon and Serratula. 3. Those with the florets 

 tubulate ; of which there are thirteen, viz. Ethulia, 

 Ageratum, Cacalia, Chrysocoma, Eupatoriurn, San-^ 

 tolina, Calea, Athanasia, Spilanthus, Bidens, Stae- 

 helina, Pteronia and Tarchonanthus. 



ORDER II. POLY G AMI A SUPERFLUA, compre- 

 hending such plants as have the florets of the disk her- 

 maphrodite, and those of the radius female. This or- 

 der contains thirty-nine genera, distinguished into 1, 

 Tubulose; of which there are nine, viz. Artemisia, 

 Carpesium, Tanacetum, Cotula, Baccharis, Conyza, 

 Gnaphalium, Xeranthemum and Anacyclus. 2. Flo- 

 rets ligulate, sub-bilabiate ; of which there is one ge- 

 nus, viz. Perdicium. 3. Radiate; of which there are 

 twenty-nine, viz. Bellis, Matricaria, Chrysanthemum, 

 Unxia, Doronicurn, Arnica, Inula, Erigeron, Soli- 

 dago, Cineraria,. Senecio, Tussilago, Aster, Be Ilium, 

 Tagetes, Helenium, Pectis, Boltonia, Leysera, Siges- 

 beckia, Eclipta, Anthemis, Achillea, Buphthalmum, 

 Amellus, Tridax, Terbesina, Relhania and Zinnia. 



ORDER III. POLYGAMIA FRUSTRANEA, compre- 

 hending such plants as have the florets of the disk 

 hermaphrodite, and those of the radius neuter. This 

 order contains nine genera, viz. Sclerocarpus, Gorte- 



