26o 



MY GARDE A'. 



summer. Like all the bog plants, it is a difficult plant to grc 

 mine frequently die. On the occasion of the next importa 

 propose to attempt to acclimatize them, by growing them in a 

 door bog. 



There is a greenhouse water plant which should always be 

 the Aponogeton distachyon (fig. 532). It grows freely in a \ 

 water with soil at the bottom, and it flowers abundantly in 

 After flowering it deposits its seeds at the bottom of the pa 

 numerous young plants arise. I have known it to grow out of 

 it is killed by severe frosts : nevertheless, I shall attempt to 

 matize it .again, as, at the Botanic Gardens in Edinburgh, it 

 in an open pond in the highest luxuriance, and is there a be 

 aquatic plant. 



Fig. 532. — ^Aponogeton distachyon. 



Fig. 533. — Valiisneria spiralis. 



Fig. 533 ffl. — Nympha 



Another aquatic plant, the Vallisneria spiralis (fig. S33), w 

 bi-sexual, and of which the female plant is almost exclusively 

 in this country, is always cultivated in every greenhouse beloni 

 the mjcroscopist. Under a high power of the microscope it si 

 circulation in each cell ; and, particularly, Messrs. Powell and Le 

 •^th object-glass exhibits this feature in perfection. The p' 

 easily grown in common soil in a pan of water, and the litt 

 flower upon a stem of two or three feet in length is very cui 



I have grown the splendid Nymphcea ccerulea (fig. S33<z) with 

 success in my vinery, as well as Limnocliaris Humboldtii, and 

 other aquatics; but water plants require full sunlight, or to be 

 close to the glass, or they will not succeed. The vines, however, 



