DIDYNAMIA. ^5 



lAimium has the mouth toothed on each 

 aide, f. 7C8. 



Pritncllay t. 9^1, has forked filaments; 

 Clconia 4 stigmas; Prasium a pulpy coat 

 to its seed:>. These instances will sufhce 

 as clear examples of natural genera, di- 

 stinguished by an essential technical cha- 

 racter, in a most natural order. 



2. Angiospermia. Seeds in a capiule, and 

 generally very numerous. — The plants of 

 this order have the greatest possible affinity 

 with some families in Pentandria Monogy- 

 Ilia, Some species even vary from one 

 class to the other, as Bignonia radicaus. 

 Curt. Mag. t. 485, and Antirrliinum 

 Linaria, Engl. Bot. t. 658, 260, in which 

 the irregular corolla becomes regular, and 

 the 4 unequal stamens are changed to 5 

 equal ones ; nor does this' depend, as has 

 been asserted, on the action of any extrane- 

 ous pollen upon the stigmas of the parent 

 plant, neither are the seeds always abortive. 

 No method of arranc^ement, natural or ar- 

 tificial, could provide against such ano- 

 malies as these, and therefore imperfections 

 must be expected in every system. 

 2 F 2 



