228 ALPINE FLOWERS AND ROCK GARDENS. 



white variety called alhus^ and a carmine one called 

 carmineus. 



ERITRICHIUMNANUM.—TlAshesiutiMBomge' 

 wort, with its blue flowers borne only a few inches high 

 in June, is a charming addition to any rockery, but it 

 is not an easy plant to grow. It reminds one of the 

 Forget-me-nots in bloom, but is by no means so 

 accommodating as those free-growing plants. It is not 

 a lime-lover, yet Hkes the neighbourhood of stones. 

 It should be provided, if possible, with granite chips 

 intermixed with peat, loam and leaf mould. A suitable 

 compost will not avail, however, if it is subjected to 

 much wet in winter, and it had better be put in a 

 position where it stands a fair chance of escaping such 

 an ordeal, and protected with a square of glass in 

 winter. It may be raised from seed sown under glass 

 in spring, and subsequently increased by division. 



ERODIUM (Heron^s Bill).— The Heron^s bills 

 resemble the hardy Geraniums, but are more suitable 

 for the rockery, as they are more compact in growth. 

 They are easy to manage, and they will thrive in ordinary 

 soil if not very wet, and may be raised from seed, or 

 propagated by division, in spring. Chamaedryoides 

 (Reichardi) is one of the prettiest. It is quite a minute 

 plant, with white, pink- veined flowers. Macradenum 

 has violet flowers, and Manescaviy which is taller, 

 purple. Both are worth growing. The Heron's bills 

 come into flower late in spring. 



ERYSIMUM. — A small genus, one member of 

 which, Peroffskianum, is grown as a hardy annual for 

 summer blooming. One or two of the perennials are 



