346 ROCK GARDENS 



two to three on a stem, and not singly, as in others of the type. 

 It is not of particularly easy culture, but a handsome plant. 



6". bryoides. — Is a glabrous form of above, distinct, and of stronger 

 growth. 



S. Boryi {Group III., Cushion). — Forms a very compact little 

 tuft of very small rosettes. It has white flowers very like S. Boydii 

 alba. A rare plant, but not difficult to grow. 



S. Boydii {Group III.., Cushion). — A hybrid, S. aretioides and 



burseriana. Forms dense, spiny tufts of greyish-coloured leaves. 



Large yellow flowers. A very slow-growing species, and not easy 



to cultivate. S. B. alba is a white form. Very handsome and 



^ vigorous, quite one of the best, and of very easy culture. 



S. bronchialis {Group IV., Creeping). — Creamy-white flowers in 

 panicles, and spiny leaves. 



S. Bucklandi {Group V., Umbrosa). — Rather like a small version 

 of S. Geum, and of easy culture, and quite pretty. 



S. burseriana {Groicp III., Cushion). — Forms dense little 

 cushions of grey spiny leaves. Flowers large and solitary. Buds 

 and stems ruby-red. Blooms in March. One of the most beautiful 

 of the genus. Though not difficult to cultivate, it is liable to " go 

 " off." An annual top dressing of grit and loam, worked into the 



crown of the plant, will be found beneficial. Rather a shy bloomer. 

 There are several forms of this. 



S. b. Gloria. — Is of free habit, and has enormous pure white 

 / flowers, sometimes i\ inches across, borne on stems 4 to 5 inches 

 high. It is a most glorious plant, and the gem of this species, if 

 not of the whole group. 



S. b. 7najor. — Has larger flowers, and more freely produced than 

 the type, and is of more vigorous habit. It is also a very desirable 

 plant. 



S. b. speciosa. — Is freer flowering, and of more generous habit 

 than the type. The flowers are borne on very short stems. 



S. caesia {Group III., Cushion). — Forms very minute rosettes, 

 each leaf spotted with silvery dots. Large milk-white flowers, one 

 or two on each slender stem. A rare plant, and difficult to get 

 true to name. S. crustata, which belongs to the encrusted group, 

 is sometimes sold for this plant. 



S. caespitosa {Group /., Mossy). — A pretty, free-growing species, 

 with numerous white flowers. 



S. c. purpurea is a red variety of the above. 



S. Camposii, syn. S. Wallacei {Group /., Mossy). — Very free and 

 vigorous habit. Large white flowers, borne in the greatest pro- 

 fusion in May. The best of the white-flowered mossy Saxifrages, 

 and should be very freely grown. 



S. cartilaginea {Group II., Encrusted). — Drooping panicles of 



