DESCRIPTIVE LIST OF THE BEST KINDS 223 



and fragrant, and plenty of flowers for a long time in 

 summer. Numerous sorts are in cultivation, but among 

 the best are the following : E. chamaedrioides, or 

 Reichardi, white, requiring a warm place ; E. chry- 

 santhum, yellow, the most difficult to keep ; E. corsicum, 

 rose ; E. guttatum, white with black blotches ; E. 

 olympicum, pink ; E. cheilanthifolium, rose ; and 

 E. trichomanefolium, blush, with deeper veins. Raised 

 from seeds, or increased by division in early spring or 

 autumn. 



Erysimum (Fairy Wallflower). Natural order, the 

 Wallflower family (Cruciferae) . Erysimum rupestre, found 

 wild on the mountains of Northern Europe, is the most 

 valuable for the rock garden, since, unlike most others, 

 it forms a compact mass of evergreen leaves that spreads 

 quickly. It looks best when planted on top of a low 

 bank or mound, and needs only ordinary soil. The light 

 yellow flowers on stems several inches high resemble 

 miniature Wallflowers, and give the finest display in April. 

 It is easily raised from seed sown in spring or summer. 



Erythronium. See Bulbs for the Rockery. 



Euphorbia (Spurge). Although some of the members 

 of the Spurge family (natural order Euphorbiaceae) are 

 handsome foliage plants, only a few may be considered 

 of any great value for the rock garden. Among the taller 

 kinds there is E. Characias, which is a handsome plant 

 all the year round, forming a bushy mass of evergreen 

 glaucous foliage, and producing reddish-brown inflor- 

 escences in early summer. Others of similar character 



