CARYOPHYLLEyE 29! 



(5oo-i8oo m.); the origin of the "sylvan" misnomer is 

 mysterious. 



This charming plant is quite successful in Swiss gar- 

 dens, on a rockery, on dry, arid slopes and in the border. 

 It requires full sun and a soil of stone chips. A white- 

 flowered variety is cultivated at Floraire. 



D. cxsius* (Cheddar Pink) is a small grass-like plant, 

 with a running root-stock, bluish green in colour, and 

 forming large low, flat tufts; stems bearing one large 

 flower of pale rose, with bearded, dentate petals; fragrant. 

 July-August. Dry pastures and rocks of limestone Alps 

 and the Jura, but sporadic. (1000-1800 m.). 



Culture: full sun in a gritty chalk rockery, or mossy 

 chink of walls. Unsuited to the heavier soil of an ordinary 

 border. 



D. glacialis. A miniature species, with Jong wiry leaves 

 of shining dark green, forming a tuft in whose midst are 

 hidden flowers of medium size, scentless, of most brilliant 

 carmine-red colour, rising on stems so short that they 

 are overtopped by the leaves. July-August. Granitic 

 Alps of the Grisons from 1900 to i5oo m. 



It is a capricious species in cultivation, being generally 

 considered the most difficult to grow, and yet occasionally 

 rampant in almost pure sand. It is a lover of moisture if 

 not stagnant. To be planted in a well drained niche of 

 granite, with a porous soil of leaf-mould, granite sand, 

 loam and peat; lime be must avoided. A regular top- 

 dressing of coarse grit must be given in autumn, and sandy 

 gritty loam worked among the young plants during the 

 year from time to time. 



D. superbus (PI. XIX). Stems upright or drooping, 

 branching above; lanceolate leaves of dark green; large 

 flowers of violet-lilac, with long petals deeply cut and 

 fringed, spotted green at the base; perfume delicate and 



