GREENHOUSE AND HOTHOUSE FLOWERS 159 



they are also liable to come when the air is stagnant, and what we 

 should describe as "close" or "heavy." The cultivator must give 

 due consideration to these points, and act accordingly. Sulphur in 

 some form is the best remedy for mildew. It may be used in the 

 form of the yellow powder known as flowers of sulphur, or through 

 the chemical liver of sulphur, otherwise known as sulphide of potas- 

 sium. The latter is very cheap, and may be applied conveniently 

 in solution. Dissolve one ounce of the chemical and two ounces of 

 soft soap in five gallons of water, and spray the mixture on in as 

 fine a state as possible. It is best to 

 carry the plants outside the house for 

 the purpose, as the solution will stain 

 paint. The fungoid disease of Chrysan- 

 themums which is known as "rust" 

 may be attacked by the same means. 

 In the case of fungoid, as in that 

 of insect, attacks, success in repelling 

 the disease turns largely upon prompt 

 action. 



1 1 ACHIMENES 



Let us now proceed to consider the . * 1 1. * ^ 



A, compost ; B, tubercles ; C, covering soil ; 



most beautiful flowers for glass-houses. 

 We shall find that there is no lack of 

 material for all classes of structure, 

 alphabetical order. 



Acacias are charming greenhouse plants, which bloom in late 

 winter and in spring. They have pretty little balls of yellow 

 blossom borne in great profusion, and are easily grown. Armata, 

 dealbata, and leprosa are three good sorts. 



Achimenes. These plants might well be more extensively 

 grown, for both leaves and flowers are attractive. They make 

 splendid effects in baskets or pans, an ordinary compost being 

 employed. 



Amaryllises (Hippeastrums), These have been mentioned under 



D, dormant tubercle ; E, tubercle grow- 

 ing, in fit state to transplant. 



We will take them in 



