420 HEPTANDRIA. 



folia of the latter ; with Damasonium of 

 the former, a genus consisting of the Lin- 

 naean Stratiotes alismoi-des, Exot. Bot. 

 t. 15. 

 6. Polygynia. Alisma only— Engl. Bot. 

 t. 837, 775, &c. 



Class 7- Heptandria. Stamens 7- Orders 4. 



1. Monogynia* Trientalis, Engl. Bot. 1. 15, 

 a favourite plant of Linnaeus ; and JEscu- 

 luS) the Horse Chesnut. Several genera 

 are removed to this order by late writers. 



2. Digynia. Limeum, an African genus, 

 only. 



3. Tetragijiiia. Saururtis^ a Virginian plant. 



Aponogeton, placed here by Linnaeus, is 

 now properly removed to Dodecandria. It 

 is an East Indian and Cape aquatic genus, 

 bearing above the water white fragrant 

 flowers in a peculiar spike, which is either 

 solitary or double. 



4. Heptagynia. Sepias^ a Cape plant, very 

 nearly akin to Crassula, to which Thunberg 

 refers it. If its character in Linnaeus be 

 constant with respect to number, it is very 



