i 



152 ALPINE FLOWERS AND ROCK GARDENS. 



three feet high, in July. It forms the subject of one 

 of the coloured plates, in association with Rhododendron 

 ferrugineum, and in another is associated with Gentiana 

 lutea. 



Przewalskii is a July bloomer, rich blue in colour. 

 It thrives in peat and loam. 



Pyrenaica is a dwarf spring-flowering species, with 

 blue flowers and narrow, pointed leaves. ' It likes loam 

 with plenty of grit, a sunny position, and abundance 

 of water in summer. 



Septemfida is a lovely little blue species from the 

 Caucasus, growing about nine inches high, and blooming 

 in July. It likes a peaty soil, with abundance of sand- 

 stone grit. There is a fine variety of it called lati folia. 



Verna. One of the choicest of rockery gems, forming 

 dense tufts of gUstening foUage, and bearing flowers 

 of a rich intense blue, with white eye, in April. There 

 is a white variety called alba, and a large form called 

 grandi flora. The vernal Gentian enjoys a sunny spot 

 with a very gritty soil. It must not suffer from want of 

 water in summer, and limestone or sandstone chippings 

 will help to keep the soil moist by checking evaporation. 

 Failures with it are frequent, and have given it the 

 reputation of being a troublesome plant to grow, but 

 they generally arise from drought. Top-dressings of 

 sandy peat are good when flowering begins. 



Walujewi is a distinct Gentian, producing white 

 flowers, spotted with blue, in dense heads during June. 



There are many other Gentians besides those named, 

 but only the collection-hunter will want a larger number. 

 Those named, demanding, as the hints about soil and 



