THE ROGKFOIL OR SAXIFRAGE 169 



full sun or half-shady positions. As long as the soil is 

 very gritty and well drained there is no difficulty in 

 growing this species. Some of the most distinct forms 

 are var. balcana with flowers densely spotted with pink ; 

 var. flavescens with pale yellow flowers ; var. baldensis, 

 a most minute and compact form ; var. pectinata, having 

 rather longer leaves with a silvery serrate margin ; var. 

 robusta, one of the tallest, with large rosettes ; and 

 var. sempervivoides, with rosettes of leaves resembling 

 those of some of the Sempervivums. 



5. Andrewsii. A natural hybrid found in Ireland 

 by A. M. Andrews, and supposed to be a cross between 

 S. umbrosa and S. Aizoon. It has rosettes of prettily 

 serrated green leaves, and erect panicles of whitish 

 flowers spotted with red. It is an interesting plant, 

 that likes a half-shady position, forming spreading tufts 

 of evergreen foliage. S. Guthriana, from the Pyrenees, 

 is almost identical with this plant. It likes a moist 

 position, with plenty of leaf -soil. 



S. catalaunica, from the Pyrenees, is a choice and 

 rare Saxifrage with rosettes of recurved leaves, having a 

 broad silver margin, which give it a most distinct and 

 handsome appearance. In early summer it bears long 

 densely flowered sprays of good-sized white flowers. It 

 may be grown on a rocky ledge in full sun. 



5. cochlearis may be described as one of the neatest 

 and prettiest in habit of growth, with small rosettes of 

 silvery, spoon-shaped leaves packed closely together 

 and forming a dense tuft. The flowers are produced in 



