Xll THE LINNvEAN CLASSES AND ORDERS. 
The 23rd Class has 2 Orders.— Monoecia, stamens and 
pistils in separate flowers in the same plants. Bioecia, 
stamens and pistils as different plants. 
The 24th Class is divided into 6 Families. 1.— Filices, 
ferns. 2.— Musci, mosses. 3 .—Hepatic a;, liverworts. 
4.— Alga, sea-weeds. 5.— Lichenes, lichens. 6.— 
Fungi, mushrooms. 
