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352 ROCK GARDENS 



opposite leaves on trailing stems. Flowers very large and of a 

 purplish-crimson colour, and borne in the greatest profusion in the 

 beginning of March. If planted in anything of rich soil, it will be 

 liable to run to leaf too much and not flower well. It is a very 

 handsome plant, of which there are several forms, which, except in 

 name, differ but slightly. They are coccinea^ splendens^ major, etc. 

 There is also a white form which has flowers smaller than the type. 



S. Paulinae {Group III., Cushion). — Rather similar to S. Boydii, 

 but far more vigorous, and has larger flowers, of a lovely pure lemon- 

 yellow, freely borne. Quite a new introduction, and promises to be 

 one of the gems of the genus. 



S.peltata {Group V/., Megasea). — To see this handsome Saxifrage 

 at its best, it should be planted in rich, very moist soil, such as the 

 edge of a stream. It has large fleshy leaves, sometimes 15 to 18 

 inches across, and heads of pale pink flowers on stems 2 to 3 feet 

 high. A very fine plant for a marshy spot. 



S. pri7nuloides {Group K, Unibrosa). — Forms dark green 

 j/ rosettes, and loose racemes of bright carmine-rose-coloured flowers. 

 Very pretty, and of easiest culture. 



5. purpurascens {Group VI., Megasea). — Large, handsome, 

 glabrous, obovate leaves. Flowers purple, in few flowered panicles 

 in June. 

 . S. pyramidalis (see Cotyledon). 



S. retusa {Group IV., Creeping). — Like a very small, smooth- 

 leaved S. oppositifolia. It has lovely ruby-red flowers, in May. It 

 is rather a shy bloomer, and of slow growth. A very attractive 

 plant. 



5. rivularis. — Requires a very moist position. It has large white 

 flowers, one or two on each stalk. Stems decumbent and rooting. 

 A native. An attractive plant for a wet spot. 



S. rocheliana {Group III, Ctishion). — Forms a compact tuft of 

 / small rosettes of leaves, white at the edges, with distinct impressed 

 dots. Rather flat heads of white flowers in April. A very good 

 plant, and of easy culture, and blooms freely. 



S. rotundifolia {Group VI., Megasea). — Likes rather rich soil in a 

 half-shady position. It has large, roundish, fleshy leaves. Flowers 

 white, spotted with pink, in May and June. A handsome, deciduous 

 plant for the bog garden. 



S. rudolphiana {Group IV., Creeping). — Very like S. retusa, but 

 of more compact habit. It is a rare species and difficult to cultivate. 



S. Salo77toni {Group III, Cushion). — Makes tufts of spiny grey 

 leaves. Pure white flowers, one to three on each stem. Blooms in 

 early spring. It is a garden hybrid, S. burse? iana x S . rocheliana, 

 and is of much beauty and value, and of easy culture. 



S. sannentosa (" Mother of Thousands "). — This species, though 



