236 ALPINE FLOWERS AND ROCK GARDENS. 



upright habit, but only grows a little over a foot high, 

 is suitable. The latter bears large yellow flowers in 

 Summer. They are propagated by cuttings of ripe 

 shoots in Summer, struck under glass. Sandy loam is 

 a suitable soil. 



IBERIS (Candytuft). — Few things make a more 

 pleasing feature of the rockery than a broad patch of 

 one of the free-growing perennial Candytufts, such as 

 corifolia or sempervirens. It is true that they have 

 not brilliant colours to recommend them, but they 

 produce large numbers of pretty white spikes of bloom. 

 In congenial quarters they spread into broad masses, 

 covering the face of large stones. These Candytufts 

 are not fastidious as to soil ; they thrive in gritty 

 loam, but any fairly Hght and friable garden soil will 

 suit them. The evergreen perennial kinds are the 

 most suitable for the rockery, and these may be raised 

 in the first place from seed sown out of doors late in 

 Spring, and increased subsequently by cuttings struck 

 in sandy soil in a shaded frame. The following are 

 a few of the best perennial Candytufts : — corifolia is a 

 small evergreen species, producing white flowers in 

 May or June ; it is a most abundant bloomer. 

 Gibraltarica is a larger but less hardy kind ; it cannot 

 be relied on to pass the Winter in cold, exposed places. 

 It bears white or pink-tinted flowers in May. There 

 are several good varieties of it, notably GarrexianUj 

 which is superior to the type ; Little Gem, very low 

 and dense ; and superba, which has very large spikes 

 of bloom. Tenor eana has purplish flowers, which 

 it bears in June, and therefore gives diversity of colour. 



