360 CLASSIFICATION. 



684. The orders, in the first thirteen classes of the Linnsean ar- 

 tificial system, depend on the number of styles, or of the stigmas 

 when the styles -are wanting; and are named by Greek numerals 

 prefixed to the word gynia, used metaphorically for pistil, as 

 follows : 



Order 1. MONOGYNIA embraces all plants of any of the first thir- 

 teen classes, with one style to each flower. 



2. DIGYNIA embraces those with two styles. 



3. TRIGYNIA, those with three styles. 



4. TETRAGYNIA, those with four styles. 



5. PENTAGYNIA, those with five styles. 



6. HEXAGYNIA, those with six styles. 



7. HEPTAGYNIA, those with seven styles. 



8. OCTOGYNIA, those with eight styles. 



9. ENNEAGYNIA, those with nine styles. 



10. DECAGYNIA, those with ten styles. 



11. DODECAGYNIA, those with eleven or twelve styles. 



12. POLYGYNIA, those with more than twelve styles. 

 The orders of class 14, Didynamia, are only two ; namely, 



1. GYMNOSPERMIA, meaning seeds naked, the achenia-like 



fruits having been taken for naked seeds. 



2. ANGIOSPERMIA, with the seeds evidently in a seed-vessel 



or pericarp. 



The 15th class, Tetradynamia, is also divided into two orders, 

 which are distinguished by the mere form of the pod : 



1. SILICULOSA ; the fruit a silicle (615), or short pod. 



2. SILIQUOSA; fruit a silique (615), or more or less elongat- 



ed pod. 



The orders of the 16th, 17th, 18th, 20th, 21st, and 22d classes 

 depend merely on the number of stamens ; that is, on the charac- 

 ters of the first thirteen classes, whose names they likewise bear : 

 thus, 



Order 1. MONANDRIA ; 2. DIANDRIA; and so on. 



The orders of the 19th class, Syngenesia, are six; namely, 



1. POLYGAMIA JEQUALIS, where the flowers are in heads (com- 



pound, 394), and all perfect. 



2. POLYGAMIA SUPERFLUA, the same as the last, except that 



the rays, or marginal flowers of the head, are pistillate 

 only (473). 



