ACCOUNT OF GENUS SEDUM AS FOUND IN CULTIVATION. 145 



number of plants, largely European and Mexican, with few or no 

 close allies, displaying a wide range of characters. The most 



convenient subdivision of this large and heterogeneous section is 

 founded on flower-colour, growth-form, and leaf-shape. 



Among Old World Sedums, S. populifolium, with its twiggy, erect 

 growth, differs much from the typical Seda Genuina ; but in Mexico 

 many species occur of habit linking up populifolium with the others, 

 and pointing to its inclusion with them among the Seda Genuina. 



VOL. XLVI. 



