LINN^AK SYSTEM. 405 



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



and Nettle. 

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



and Bryony. 

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



and Black Bryony ( Tavms). 

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

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



and Frog-bit. 

 Order 9. Becandria, with ten stamens. 

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

 Order 11. Foli/andria,vrith numerous stamens, as in Poterium 



and Sagittaria. 

 Order 12. Monadelphia, with the stamens united into one 



bundle, as in the Yew, Juniper, and Fir. 

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



in the Castor Oil Plant. 



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



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

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

 only British genus comprised in this Class. 



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

 staminate and pistillate flowers on another plant, as 

 in Htppophae. 



Order 3. Triceda, M^here 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. {Fig. 12.) 



Order 2. Musci, the Mosses. {Figs. 8 and 9.) 



Order 3. HcpaticacecB, the Liverworts. {Figs. 811 and 813.) 



Order 4. Lichencs, the Lichens. {Figs. 82i and 822.) 



Order 5. Fungi, the 3Iushrooms. {Figs. 4 — 6.) 



Order 6. Algce, the Seaweeds. {Fig. 7.) 



The following table of the Classes and Orders of the Linnsean 

 System, will show at a glance their distinctive peculiarities : — 



