GREENHOUSE AND WINDOW-GARDEN WORK. 165 



fuchsia, and carnation. Those which are nearly exempt are 

 most kinds of geraniums, begonias, wandering Jew, and most 

 ferns. (For insects, see p. 17.) 



19. Vegetables used for Forcing under Glass. 



Asparagus. 



Bush Bean. 



Carrot. 



Cauliflower ; generally matured 

 under glass, as a late spring 

 crop. 



Cress. 



Cucumber ; there are two types 

 of forcing cucumbers, the 

 common, or White Spine 

 type and the English or 

 frame varieties. 



Lettuce. 



Muskmelon; generally grown 



as a late fall or late spring 



crop. 

 Parsley. 

 Pea. 

 Radish. 

 Rhubarb. 

 Sweet herbs, particularly 



spearmint. 

 Tomato. 



Lettuce, tomato, cucumber, asparagus, and bean are gener- 

 ally the most profitable forced crops in this country, in about 

 the order named. 



20. Twenty-five Useful Aquatic and Sub-aquatic Plants for 

 Out-door Use. 



T denotes those which do not endure the winter. 



Acorus gramineus, variegated. 

 Aponogeton distachyum. 

 Azolla Caroliniana. 

 Caltha palustris. 

 Cyperus alternifolius ; t. 

 Eichhornia crassipes or azurea, 



(properly E. speciosa) ; t. 

 Limnanthemum Indicum ; t. 

 " nymphoides. 



Liinnocharis Humboldtii (Hy- 



drocleys Commersonii) . 



Myriophyllum proserpinacoi- 

 des; t. 



Nelumbium(jyeZwm&o). Many 

 species and varieties. Some t. 



Nuphar advena. 



Nymphsea. Many species and 

 varieties. Some t. 



Ouvirandra f enestralis (Apono- 

 geton fenestrale} ; t. 



Papyrus (Cyperus Papyrus); t. 



