292 



THE BOOK OF GARDEXIXG. 



flowers with yellow markings during July. C. Kolpakoivskyana 

 grows about 6in. high, and yields its pink or purple flowers with 

 long spurs during April. C. lutea is an excellent species for dry 

 situations ; it reaches a height of ift., and bears a profusion of 

 yellow flowers during May and June. C. nobilis grows about ift. 

 high, and in IMay produces masses of yellow flowers with long 

 spurs ; it prefers a moist, shady situation. 



DiAXTHUS (the Pink genus) contains several perennials which 

 are very ornamental rock-garden as well as border-plants. They 

 are increased by seeds, cuttings (known as pipings), and layers. 

 D. alpinus is a charming little alpine, with dark green foliage, 

 and large crimson flowers lin. across ; it grows only about 4in. 

 high, and flowers in June and July. D. ccBsiiis {D. pulchelliis\ 

 the Cheddar Pink, is a plant with glaucous foliage and rosy- 

 pink flowers ; it grows from 3in. to 6in. high, and is generally 

 in blossom during May and June. D. pluniariiis (Common 

 Pink) grows ift. high, and during June and July bear snumerous 

 white or pink sweet-scented flowers, fringed at the margin : it 

 is from this plant that our garden Pinks have sprung. Other 

 dwarf species suitable for the rock garden are D. glacialis and 

 D. petrceus, with rose-coloured, and -D. 7i€glectus, with pink 

 flowers. 



Drabas are charming spring-flowering plants suitable for the 

 rockery. D. aizoides is a pretty alpine, forming compact tufts 



3in. high, and pro- 

 ducing bright yellow 

 flowers during ]March 

 and April. £>. bruiiice- 

 folia forms dense, 

 moss-like tufts from 

 2in. to 4in. high ; it 

 also has yellow flowers, 

 produced about June. 

 D. JIaii'ii (Fig. 171) 

 is a dwarf rock plant, 

 forming dense tufts of 

 foliage, and bearing an 

 abundance of pure 

 white flowers in spring. 

 D. pyre n a tea is a gem, 

 growing 3in. high ; the 

 flowers, which are 

 borne in ^lay, are 

 first white, but afterwards change to a soft rose-colour. 



Dryas octopetala is a beautiful alpine, with small, Oak-like 

 leaves and large, white, solitary flowers, each with eight petals ; 

 it growls only about 3in. high, and flowers in May and June. 



