NEW AND BEAUTIFUL ROCK PLANTS 109 



(syn. setacea) are the principal species. The former 

 is a charming Alpine with lilac flowers on stems about 

 a foot long; there is a splendid variety of it called Laphami, 

 which bears huge lavender flowers in May. Perry's 

 variety is equally good. There are also a white named 

 alba and a dark form named Violet Queen. Divaricata 

 looks beautiful when planted in a groundwork of the 

 lovely little white grape Hyacinth, Muscari botryoides 

 alba, either on the rockery or at the front of a border. 

 Subulata is of prostrate habit, and bears its flowers in 

 such profusion that the plants are quite covered with 

 bloom ; of its many varieties annulata, lavender, The 

 Bride, white, pink eye, Newry Seedling, lilac, Vivid, 

 rose, Kathleen, lilac, crimson eye, G. F. Wilson, mauve, 

 frondosa, rose, atropurpurea, purple, Nelsoni, white, 

 and Seraph, white with blue centre, are particularly 

 worthy of mention. Another good Phlox for rockwork 

 is amoena, rose ; the variety rosea is bright rose ; these 

 bloom in May. Reptans, with satiny rose flowers on 6-inch 

 stems in May, ought to be mentioned also. While the 

 Alpine Phloxes do best in a good loamy soil with plenty 

 of moisture they will do very well in comparatively poor 

 soil. Propagation by cuttings after flowering. Pilosa 

 is a handsome and distinct Alpine Phlox, with erect 

 hairy stems about a foot high bearing heads of rose 

 flowers ; alba is a white variety of it and Brilliant a 

 crimson ; they like sandy loam and a sunny position. 



POLEMONIUM. The species reptans, which has 

 opposite, heart-shaped leaves and satiny blue bell- 

 shaped flowers on 6-inch stems in May, is a nice rockery 

 plant. Confertum, blue, and its white variety melitum, 

 dwarf summer bloomers, are also good. Richardsoni, 

 with bright blue flowers, is somewhat taller, but may 



