DIELYTKA EOHEVERIA. 355 



of this family. Green fly also attacks ttese plants, but it can 

 easily be destroyed by slightly fumigating. 



DiELITBA. 



A genus of hardy herbaceous perennials, belonging to 

 Fumariaceai, and nearly allied to Corydalis. We have intro- 

 duced it in this place to include D. spectabiUs and its white- 

 flowered variety flore albo. These, on account of the ease 

 with which they may be forced for the decoration of the 

 greenhouse during the winter months, and from the beauty 

 and distinct character of the flowers, should be used by every 

 one. They are tuberous-rooted i^lants, succeeding admirably 

 in rich turfy loam and sand. Alter blooming they grow best 

 if planted in the open border in the soil recommended, and 

 after the stems have decayed in autumn they should be agaia 

 taken up and potted, to be brought into the forcing-house as 

 may be required. The species is a native of China. 



ECHETEEIA. 



A genus of Crassulacea, the species of which have thick 

 fleshy leaves, often arranged in a rosulate manner, and in 

 many of the species variously tinted or powdered ; they 

 produce spikes of scarlet, yellow, pink, crimson, and orange- 

 coloured flowers, and many of them can be made to produce 

 these through the months of February and March, when they 

 are valuable acquisitions. This has induced us to introduce 

 them here. Echeverias should be grown in a mixture of 

 sandy loam and old brick rubbish broken small, with a little 

 peat added ; they are increased by seed, and by making 

 cuttings of the leaves, which should have the base dried 

 before being put in the cutting-pot. The majority of the 

 species are natives of Mexico. 



