On the different Species -of Dahlia, 



tumn of 1803. The same reasons for which I have changed 

 the specific name of the first species, oblige me to offer new 

 ones for these two. Cav anilles' names are actually false : 

 for, no variety of the second has yet been seen with rose 

 coloured florets : nor of the third with scarlet : so that on this 

 account Dr. Sims has very justly hesitated to quote him in 

 the Botanical Magazine ; and a yellow variety having since 

 been introduced, it is become doubly objectionable. Both 

 these species are more tender and flower later than the first, 

 so that they require with us every help which art can give to 

 forward them in spring. The best method I can suggest, and 

 which succeeded at Mill Hill, is to keep them always in pots, 

 except a plant is wanted to be much branched for making 

 cuttings. After the first day of April, accelerate their growth 

 in a very airy frame, exposed as much as possible to the light, 

 but with very little or no bottom heat from dung, and about 

 the middle of June, plunge the pots clpse to a south east, or 

 south wall, nailing up the branches as they shoot. All the 

 secondary branches should be pinched off while tender, with 

 the finger and thumb, and even their principal leaves partly 

 cut off, if the plants are disposed to be very luxuriant ; just 

 water enough to keep them growing must be given daily, 

 but no more. 1 need not add, that in such heavy rains as 

 sometimes fall here after the summer solstice, they must 

 have no water at all ; but rather, if possible, be protected 

 from their violence by a glass light. 



