110 SELECTION OF PLANTS. 



is a native of Austria, and was first brought to England in 

 1732. 



It belongs to the 14th Class, under the head "Didy- 

 namia Angiospermia." 



$SW There are 39 others of this genus, a few of them 

 greenhouse plants, but most of them hardy Annuals. 



333. SCORZONERA ROSEA, or Rose-coloured Viper's Grass. 



This is a hardy Perennial, which blows in June and 

 July ; it affects a dry soil and an open situation ; it is pro- 

 pagated by parting the roots in the spring ; is a native of 

 Hungary, and was first brought to England in 1807. 



It belongs to the 19th Class, under the head "Synge- 

 nesia 



334. DISANDRA PROSTRATA, or Trailing Disandra. 



This is a hardy greenhouse plant, which blows from 

 May to August. It affects a good loamy soil, and should 

 be plentifully watered in dry weather ; it is readily increased 

 from cuttings. This plant should stand on some elevated 

 situation, where the branches may hang carelessly down. 



It is a native of Madeira, and was first brought to Eng- 

 land in 1771. 



It belongs to the 7th Class, under the head " Heptan- 

 dria Monogynia." 



335. AZALEA VISCOSA, or White-flowered Azalea. 



This is a hardy ornamental shrub, which blows in June, 

 and requires a situation rather shady. It affects a light 

 loam, mixed with bog earth. It is usually propagated by 

 layers, which should not be taken from the mother plant 

 too soon, otherwise they will not be sufficiently rooted. 



