ORDERS OF LINN^US. 
21 
Lichens. Mushrooms. Ferns. Mosses. 
The number of classes as arranged by Linnaeus, was twenty-four. Two ot tuem, 
Poly-adelphia (many brotherhoods), which was the eighteenth class ; and Poly- 
gamia (many unions), the twenty-third class, are now, by many botanists, rejected 
as unnecessary. The eleventh class, Dodecandria, which included plants whose 
flowers contain from twelve to twenty stamens, has been more recently omitted. 
The plants which were included in these three classes, have by most botanists been 
distributed among the other classes. 
The Orders of Linnceus. 
21. The ORDERS of the first twelve classes are founded upon 
the number of Pistils ; they are named by prefixing Greek nu- 
merals to the word, gynia, signifying 
Orders found in the 
first twelve classes. 
Names. 
1. MONO-GYNIA, 
2. Dl-GYNIA, 
3. Tri-oynia, 
4. Tetra-gynia, 
5. Penta-gynia, 
6. Hexa-gynia, 
7. Hepta-gynia, 
8. octo-gynia, 
9. Ennea-gynia, 
10. Deca-gynia, 
, 13. PoLY-GYNiA, over ten pistils. 
No. of pistils. 
1. 
2. 
3. 
1. 
5. 
6. this order seldom founa. 
7. this still more unusual, 
8. very rare. 
9. very rare. 
10. 
The classes vary as to the number of orders which they con- 
tain. The orders of the 13th class, Didynamia, are but two. 
1. Gymnospermia. From gymnos, signifying naked, and 
SPERMIA, signifying seed, implying that 
the seeds are not covered by a seed-vessel. 
Seeds nsnally four, lying in th« 
calyx. 
What does Cryptogamia signify ? — Classes omitted. 21. Orders of the first twelve classes, on what 
founded 1 — How are the orders named 1 — Orders of the class Didynamia. 
