BOTANY. 



CLASSES OF THE LINNiEAN SYSTEM (continued). 



{Class 

 21. MoNCECiA Stamens and Pistils in separate flowers on the 

 same plant. 

 22. Dkecia Stamens and Pistils in separate flowers on two 

 separate plants. 

 23. PoLYGAMiA Stamens and Pistils separate in some flowers, 

 united in others, either on the same plant, or 

 on two or three distinct plants. 

 24. Cryptogamia Fructification concealed. 



ORDERS OF THE LINN^EAN SYSTEM. 



1. The Orders of the first thirteen Classes are founded on the number of styles 



1. Monogynia, 1 style. 6. Hexagynia, 6 styles. 



2. Digynia, 2 styles. 7. Heptagynia, 7 styles. 



3. Trigynia, 3 styles. 8. Octogynia, 8 styles. 



4. Tetragynia, 4 styles. 9. Decagynia, 9 styles. 



5. Pentagynia, 5 styles. 10. Polygynia, many styles. 



2. The Orders of the fourteenth Class are two, founded on the presence or (sup- 

 posed) absence of a seed-vessel : — 



1. Gymnospermia, seeds 4, apparently naked ; or ovarium 4-lohed. 



2. Angeiospermia, seeds in a distinct seed-vessed. 



3. The Orders of the fifteenth class are two, founded on the comparative length 

 of the seed-vessel : — 



1. Siliquosa, seeds in a long seed-vessel, or siliqua. 



2. Siliculosa, seeds in a short seed-vessel, or silicula. 



4. The Orders of the sixteenth, seventeenth, and eighteenth Classes are founded 

 on the number of stamens in each adelphia, or brotherhood :— 



1. Triawdria, 3 stamens. 3. Decandria, 10 stamens. 



2. Pentandria, 5 stamens. 4. Polyandria, many stamens. 



5. The Orders of the nineteenth Class are founded on the structure of the flower : — 



1. JEqualis, all the florets perfect. 



2. Superflua, florets of the disk perfect ; of the ray, pistilliferous only. 



3. Frustranea, florets of the disk perfect ; those of the ray neuter. 



6. The Orders of the twentieth Class are founded on the number of the stamens :- 

 1. Monandria, 1 stamen. 2. Diandria, 2 stamens, &c. 



, The Orders of the twenty-first and twenty-second Classes are founded on the 

 number, union, and situation of the stamens : — 

 1. Monandria, 1 stamen. 2. Diandria, 2 stamens. 3. Monadelphia, &c. 



The Orders of the twenty-third Class are three, founded on the separation of 

 the sexes in the same plant, or in different plants : — 



1. Monoecia, unisexual flowers accompanied by barren or fertile flowers, or 

 . both, all on one plant. 



2. Bioecia, the same, on two different plants. 



3. Trioecia, the same, on three different plants 



The Orders of the twenty-fourth Class are Natural orders, or Families ;-— 

 1. Fiiices. 2. Musci. 3. HepaticcE. 4. Lichenes. 5. Fungi. 6. Alga. 

 67 D 5 



