CLASSES AND ORDERS. 77 



5. Pentagynia, 5 pistils. 



6. Hexagynia, 6 pistils. 



7. Polygynia, many pistils. 



CLASS 14. DIDYNAMIA, 2 long and 2 short stamens, 

 contains 2 orders. 



1. Gymnospermia, seeds naked. 



2. Angiospermia, seeds in a capsule. 



CLASS 15. TETRADYNAMIA, 4 long and 2 short sta- 

 mens, contains 2 orders. 



1. Siliculosa, fruit a short roundish pod. 



2. Siliquosa, fruit a long pod. 



CLASS 16. MONADELPHIA, stamens united by their 

 filaments into one tube, contains 8 orders. 



1. Triandria, having 3 stamens. 



2. Pentandria, 5 stamens. 



3. Heptandria, 7 stamens. 



4- Octandria, 8 stamens. 



5- Decandria, 10 stamens. 

 G Endecandria, 11 stamens. 



7. Dodecaridria, 12 to 20 stamens. 



8. Polyandria, many stamens. 



CLASS 17. DIADELPHIA, stamens united by their fila* 

 merits into 2 parcels, contains 4 orders. 



1. Pentandria, having 5 stamens. 



2. Hexandria, 6 stamens. 



3. Octandria, 8 stamens. 



4. Decandria, 10 stamens. 



CLASS 18. POLYADELPHIA, stamens united into more 

 than 2 parcels, contains 3 orders. 



1. Dodecandria, having from 12 to 20 stamens in- 

 serted on the receptacle. 



2. Icosandria, numerous stamens inserted, in several 

 parcels, on the calyx. 



3. Polyandria, stamens numerous, more than 20, 

 inserted on the receptacle. 



CLASS 19. SYNGENESIA, anthers united into a tube, 

 contains 5 orders. 

 7* 



