NEW AND BEAUTIFUL ROCK PLANTS 121 



whatever. They are entirely hardy. One finds that the 

 mossy varieties are liable to collapse if planted in flaky 

 soil on a sunny site, and it is wise to give them cool places 

 among stones. They are easily propagated by seeds, 

 but if it is desired to increase good named varieties and 

 keep them true it is best to propagate by division in spring. 

 A brief glance must be given at the older species. In 

 the encrusted section we find aizoon and its varieties, 

 such as atropurpurea major, roseus and rosularis ; 

 Balcana, a dainty kind, with sprays of white blossom 

 dotted with rose ; cochlearis, which forms pretty cushions 

 of grey foliage and bears white flowers in July ; cotyledon 

 pyramidalis, with beautiful white plumes ; crustata, 

 white, dotted with red ; Grisebachii, long red spike 

 in late spring, a precious plant ; Hostii, with blossom in 

 graceful sprays ; lingulata superba, long spikes of white 

 flowers ; longifolia, lovely white plumes ; Macnabiana, 

 white, spotted with crimson ; mutata, coppery ; and 

 Valdensis, with silvery rosettes and sprays of white bloom. 

 In the mossy class we have Camposi ( Wallacei) , one of the 

 largest and best ; the varieties of decipiens already 

 mentioned ; globosa, white starry flowers ; hypnoides 

 and its variegated form ; Rhei, a charming species with 

 rosy flowers ; serratifolia, white ; and trifurcata, the 

 Stag's-head Saxifrage. Other pretty and interesting 

 kinds are Andrewsii, white with pink spots, encrusted ; 

 apiculata, greenish cream, moss-like, very early in bloom, 

 small dark green rosettes and white flowers ; Burseriana, 

 white, red stems, and its variety major, large white ; 

 Elizabethae, a charming yellow with rosettes of leaves ; 

 Geum, of the umbrosa (London Pride) type ; granulata 

 flore pleno, double white ; irrigua, white, leaves in grey 

 rosettes; Juniperifolia ( Juniperina) , yellow flowers; 

 L. G. Godseff, hybrid (sanctax Burseriana speciosa), 



