THE AKTIFICIAL SYSTEM OF LINN^US. 515 



998. Tlie orders, in the first thirteen classes of the Linnaaan 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. Penta GYNIA, 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. 



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



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



fruits having been taken for naked seeds. 



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



or pericarp. 



1000. The 15th class, Tetradynamia, is also divided into two or- 

 ders, which are distinguished merely by the form of the pod : — 



1. SiLicuLOSA ; the fruit a silicle (621), or short pod. 



2. SiLiQuosA; fruit a silique (620), or more or less elon- 



gated pod. 



1001. The orders of the 16th, 17th, 18th, 20th, 21st, and 22d 

 classes depend merely on the number of stamens ; that is, on the 

 characters of the first thirteen classes, whose names they likewise 

 bear : thus. 



Order 1. Monandkia, with one stamen ; 2. Diandeia, with two 

 stamens ; and so on. 



1002. The orders of the 19th class, Syngenesia, are six ; namely, 

 1. PoLYGAMiA jEQUALis, whcrc the flowcrs are in heads 



(compound flower, 394), and all perfect. 



