168 THE ARTIFICIAL SYSTEM. 



Class XX3V. CRTPToaAMiA, — ^plants ia which the organs of fructification are 



conoealed (as the name implies) as in ferns, mosses, seaweeds. 

 8t8. The LiSNiEAN ordeks. Each class is subdivided into orders, and these 

 also are founded on some condition of the essential organs. The orders of the first 

 thirteen classes are determined by the number of styles (or stigmas when the stylos 

 are wanting) in each flower. 



Order 1. Heptagynia, 7 stylos. 



Order 8. Octogynia, 8 styles. 



Order 9. Enneagynia, 9 styles. 



Order 10. Decagynia, 10 styles. 



Order 11. Dodeoagynia, 12 styles. 



Order 12. Polyginia, more than 12. 



Order 1. Monogynia, 1 style. 



Order 2. Digynia, 2 styles. 



Order 3. Trigyina, 3 styles. 



Order 4. Tetragynia, 4 stylea 



Order 5. Pentagynia, 5 styles. 



Order 6. Hexagynia, 6 styles. 



8'79. The orders of class XIT. depend upon their seed vessels. 

 Order 1. Gymnospermia — Fruit four achenia, as in the LabiatEe. 

 Order 2. Angiospermia — Fruit inclosing several seeds. 



880. The orders op class ^V. also depend on the fruit. 

 Order 1. Siliculosa — Fruit a silliclo, as in pepper-grass. 



Order 2. Siliquoaa — Fruit a sUique, as in wall-flower. 



881. The orders of classes XTI, XVIL, SVIII. are distinguished by 

 the number of stamens and named like the first classes. 



Order 1. Triandria — throe stamens united by their filaments. 

 Order 2. Pentandria — live stamens united by their filaments. 



882. The orders of class XIX. are five, as follows : 

 Order 1. Equalis — Florets of the head all perfect ( !? )■ 



Order 2. Superflua — Florets of the disk ^ , of the ray ? . 

 Order 3. Frustranea — Florets of the disk ^ , ray abortive. 

 Order 4. Necessaria — Florets of the disk J , of the ray j. 

 Order 5. Segregata — Each floret with a separate involucre. 



883. The orders op classes XX., XXL, XXII. distinguished in the same 

 way as the first thirteen, the XVI., XVIL, XVIII. classes ; as 



Order 1. Monandria — one stamen. Order 2. Diaudria — two stamens. Orders. Tri- 

 andria — three stamens, etc. 



884. The orders op class XXIII. are founded on the position of the 

 flowers relatively, thus : 



Order 1. Monoecia— Flowers !^ , $, ? on the same plant (Aeacia). 



Order 2. Dioecia — Flowers ^ on one plant, $, ? , on another (Chamorops). 



Order 3. Tricecia— Flowers ? , J , and S , each on separate plants. 



885. The orders op class XXH''. are the same as in the Natural Sya- 

 tem, and can not be defined by a single character. 



Order 1. Felices, ferns. 

 Order 2. Musci, mosses. 

 Order 3. Hepaticae, liverworta. 



Order 4. Lichens, lichens. 

 Order 5. Fungi, mushrooms. 

 Order 6. AlgSe, seaweeds. 



