THE CLASSIFICATION OF PLANTS. 413 



are not taken into consideration in the definition of those Classes. 

 Thus : — 



Order" 1. Monandria, Avith one stamen, as in the genus Orchis, 



and many other Orchidaceous Plants. 

 Order 2. Diundria, with two stamens, as in the Venus' Shpper 



( Cypripedium). 

 Order 3. Triandria, with three stamens, as in the plants of the 



genus Carex, Typha, &c. 

 Order 4. Tetrandria, with four stamens, as in the Box, Alder, 



Nettle, &c. 

 Order 5. Pentandria, with five stamens, as in the common Hop, 



Bryony (Bryonia'), &c. 

 Order 6. Hexandria, with six stamens, as in the Birthwort, 



Black Bryony (Tamus), &c. 

 Order 7. Octandria, with eight stamens, as in the Poplar. 

 Order 8. Enneandria, with nine stamens, as in Mercurialis, 



Prog-bit, &c. 

 Order 9. Decandria, with ten stamens. 

 Order 10. Dodecandria, with twelve stamens, as Stratiotes. 

 Order 11. Poh/andria, with numerous stamens, as in Poterium, 



Sagitfaria, &c. 

 Order 12. Monadelphia, with the stamens united into one 



bundle, as in the Yew, Juniper, Fir, &c. 

 Order 13. Polyadelphia, with the stamens in several bundles, as 

 in the Castor Oil Plant. 



The Orders in the 23rd Class, PoJygamia, are three, namely: 



Order 1. Moncecia, with staminate, pistillate, and hermaphro- 

 dite flowers on the same plant, as in Atriplex, the 

 only British genus comprii^ed in this Class. 



Order 2. Dioecia, with hermaphrodite flowers on one plant, and 

 staminate and pistillate flowers on another plant, as 

 in Hippopha'e. 



Order 3. Trioecia, where one plant bears hermaphrodite, another 

 staminate, and a third pistillate flowers. 



The Orders of the 24th Class, Cryptogamia, are natural, and 

 will be described under their respective heads in treating of the 

 Natural System. They are: — 

 Order 1. Filices, the Ferns. {Figs. 158, 159.) 

 Order 2. Musci, the Mosses. {Figs. 154, 155.) 

 Order 3, Hepaticce, the Liverworts. {Figs. 808, 810.) 

 Order 4. Lichens, tha Lichens. {Figs. 818, 819.) 

 Order 5. Fungi, the Mushrooms. {Figs. 150—152.) 

 Order 6. Alg(£, the Seaweeds. {Fig. 153.) 



The following table of the Classes and Orders of the Linnasan 

 System, will show at a glance their distinctive peculiarities. 



