268 ROCK GARDENS 



orange-scarlet flowers, growing about i8 inches high. Not easy to 

 grow, except in a fairly dry climate. Seed germinates freely. 



D. tatsienense. — Light sandy loam in full sun. Grows about 12 

 to 18 inches. Numerous bright blue flowers on branching stems. 

 A most attractive plant of recent introduction. 



Dentaria {see Cardamine) 



DiANTHus (Caryophyllaceae), Pink 



A large genus of neat-habited plants essentially suited for the rock 

 garden. With few exceptions they are quite easy to grow. They 

 mostly like sunny, open positions in light soil, with a little lime 

 rubbish added. The wire-worm is a great enemy of this genus, and 

 should be guarded against. 



D. alpinus. — Open position in rather moist, light soil, but will 

 not stand baking by the sun, so a half-shaded spot suits it best. It 

 requires plenty of moisture during the growing season. Forms neat, 

 compact tufts of dark glossy leaves. Large, handsome, carmine- 

 rose-coloured flowers spotted with crimson, about 3 inches high, in 

 June. Very floriferous. Easily raised from seed. A lovely little 

 plant, and one of the best of the genus, but a little uncertain, going 

 off suddenly without any apparent cause. 



D. al. alba. — A white form of the above, but not as pretty as the 

 original, the colour being rather a dirty white. Also a very free 

 bloomer. 



D. al. grandifiorus. — Is a new form of the type, claiming to have 

 larger and deeper- coloured flowers and to be of more robust 

 constitution. 



D. Atkznsoni. — Light sandy soil. This is a hybrid, and about 

 the most brilliant-coloured of the genus. Spikes of flowers of the 

 richest crimson imaginable, and so very floriferous that it generally 

 blooms itself to death, putting all its vigour into the flower-spikes 

 and making no "grass." It is advisable, therefore, to keep a stock 

 plant, cutting off" all bloom-spikes, or to group several plants together 

 in the garden, only allowing some of them to flower in the same 

 season. 



D. arenarius. — Requires a very dry, sandy, and sunny position. 

 A compact little plant, with numerous white, deeply fringed flowers, 

 with a carmine blotch at the base of petals. Blooms in May and 

 June. 



D. arvenensis. — Delights in a sunny chink amongst rock, in 

 sandy loam. Compact little cushions of glaucous leaves and rose- 

 coloured flowers. A diminutive form of D. caesius^ and very 

 pretty. 



