320 PENTANDUIA. 



removed by Hudson to the 23d class, of which ii 

 only serves to show the disadvantage ; Potamogeton, 

 t. 168, 376, and Riippia, t. 136, are examples of this 

 Order. They all have sessile stigmas. 



Class 5. Pentandria. Stamens 5. A very large 

 class. — Orders 6. 



1. Monogynia. One of the largest and most important 

 Orders of the whole system. The genera are enu- 

 merated first artificially, according to the corolla being 

 of one petal or more, or wanting ; inferior or superior ; 

 with naked or covered seeds ; but stand in the system 

 according to their affinities, and compose some 

 natural orders, as Asperifoli^e^ rough-leaved plants, 

 which have a monopetalous inferior corolla, and four 

 naked seeds, with always more or less of spinous 

 bristles or callous asperities on their foliage ; see 

 Borago,EngL Pot. t. 36, Lycopsis^ t. 938 and Echium^ 

 t, 181. Next comes that most elegant tribe of spring 

 plants denominated Prec'ice by Linnaeus, Primula^ t. 4 

 — -6, Cyclaman, t. 548, the charming alpine Aretia, 

 and Atidrosace, Curt. Mag. t. 743. These are fol- 

 lowed by another Linnrerin order, nearly akin, called 

 Rotacecs, from the wheel- shaped corolla, Hottonia, 

 Engl. Pot. t. 364, Lysimachia^ t. 161.— Convolvulus 

 and Campajuda, two large well-known genera, come 

 afterwards ; then Lobelia, t. 140, Impatiejis, t. 937, 

 and Viola, t. 619, 620, brought hither from the abol- 

 ished Linnasan order Syngenesia Monogamia. The 

 Lurid<s follow, so called from their frequently dark, 

 gloomy aspect, indicative of their narcotic and very 



