142 TOWN PLANTING 



in full sunshine. Several of the Rock Roses 

 (Helianthemum) have become quite estab- 

 lished in a London garden, where they have 

 received little attention either in the matter 

 of soil or site. They certainly like sunshine 

 and not too heavy soil. There are many 

 worthy varieties. The conspicuous Me- 

 gasea cordifolia must not be omitted from 

 a list of town plants, as in many places it not 

 only flowers freely but goes on increasing in 

 size and strength from year to year. The 

 Foam Flower (Tiarella cordifolia) is one of 

 the best of town plants, where it not only 

 looks healthy and happy, but rapidly increases 

 and is by no means difficult to please in the 

 matter of soil; which also may be said of 

 Francoa sonchifolia and F '. ramosa. Heu- 

 chera sanguined is also valuable for planting 

 in smoky localities, although H. brizoides gra- 

 cillima does better. With the exception of 

 Gentiana lutea and G. asclepiadea none of the 

 Gentians have been found suitable for town 

 planting. Both these species have stood for 

 ten years in a London garden. Erinus alpinus 



