SECT. XIX. LISTS OF TREES, &C. 347 



those that prove single, may be cut out as soon as 

 discovered. 



The fourth sowing is designed for plants to be pre- 

 served through the winter for a spring blow, and 

 should be made either the last week in July, or be- 

 fore the middle of August. Plant some close under 

 a south wall, and pot others for housing in (but only 

 in) severe weather. If two or three plants are put 

 in a pot, the single should be cut away from the dou- 

 ble as soon as discovered. 



The French stock is very floriferous, and most apt 

 to come double. The Prussian is sometimes called 

 the sea-green stock, to distinguish it from the others, 

 which are somewhat hoary leaved. 



To save the seed . which is most promising for dou- 

 ble, mark those flowers which have five or six leaves, 

 by tying a bit of thread round them. A single flow- 

 ering plant which has double ones growing near it, 

 produces the promising seed; but those single flow- 

 ers that come out before the double ones appear, it is 

 proper to nip off, as also all the late flowers, which 

 if they ripen their seeds at all, would be weak ; a 

 plant having but few pods to ripen, will certainly 

 produce the boldest seed, and of course the largest 

 plants and flowers may be expected from it. Be 

 sure that the seed is ripe, before gathered, and that 

 it is kept dry, in the pods, close tied in paper bags. 



Sultan, the yellow is the finest flower, and has a 

 very agreeable musky scene; but it is the tenderest, 

 and wilt hardly succeed without the assistance of 

 heat to bring the seeds up ; It will come, however, 

 if sown under a small hand-glass, that is air tight, 

 on a warm border. The yellow produces much finer 

 flowers, if pricked out upon* a second slight hot-bed. 



Zinnia,' the colours of this flower, are dingy, but 

 yet agreeable. Some gardeners chuse to treat it as 



