358 CLASSIFICATION. 



Class 17. DIADELPHIA (two fraternities), with the filaments united 

 in two sets or parcels (Fig. 296, 308, 320). 



18. POLYADELPHIA (many fraternities), with the filaments unit- 



ed in more than two sets or parcels (Fig. 300, 306). 



19. SYNGENESIA (from Greek words signifying to grow to- 



gether), with the anthers united in a ring or tube 

 (Fig. 309, 310), as in all Composite flowers. 

 The next class, as its name denotes, is founded on the union of 

 the stamens to the style : 



20. GYNANDRIA, with the stamens and styles consolidated, as 



in the Orchis Family (Fig. 1097). 



In the three following, the stamens and pistils are separated 

 (306) : thus, 



21. MONCECIA (one household) includes plants where the sta- 



mens and pistils are in separate flowers on the same 

 individual ; as in the Oak (Fig. 1042), &c. 



22. DIGECIA (two households), where they occupy separate 



flowers on different individuals ; as in the Willow (Fig. 

 326-328), Prickly Ash (Fig. 639-644), &c. 



23. POLYGAMIA, where the stamens and pistils are separate in 



some flowers and united in others, either on the same, 

 or two or three different plants ; as in most Maples 

 (Fig. 647-649). 

 The remaining class, 



24. CRYPTOGAMIA, is said to have concealed stamens and pis- 



tils (as the name imports), and includes the Ferns, 

 Mosses, Lichens, &c., which are now commonly term- 

 ed Cryptogamous or Flowerless plants (459). 

 The characters of the classes may be presented at a single view, 

 as in the subjoined analysis : 



