CLASS X. 

 DECANDRIA. 



Those who think nothing useful which does not yield some palpable and di- 

 rect advantage, have> indeed, scornfully rejected such inquiries as frivolous 

 and useless. But this disdain has not repressed such discussions ; and it is 

 fortunate that it has not. Amusement is itself an advantage. The vigour 

 which the understanding derives from exercise on every subject, is a great 

 advantage." EDIN. REVIEW. 



I. MONOGYNIA. 



129. PYROLA. Petals 5 ; anthers of 2 cells, with 2 pores. 



II. DIGYNIA. 



132. SCLERANTHUS. Corolla ; calyx vf 1 leaf; seeds 2. 



130. CHRYSOSPLENIUM. CorollaO; calyx coloured ; capsule with 



2 beaks ; seeds numerous. 



131. SAXIFRAGA. Petals 5 ; calyx in 5 deep segments ; capsule 



with 2 beaks ; seeds numerous. 



133, DIANTHUS. Petals 5; calyx tubular, of 1 leaf, with scales 



at the base ; capsule oblong. 



