ROCKFOIL. 
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The bright yellow flowers with a dark purplish disc 
resemble a small Rudbeckia during the summer 
months. In the double-flowered form the purple disc 
is absent, and the flower-heads are entirely yellow. 
Being compact in growth and free in blossom, the San- 
vitalia is useful as an edging to borders, or trailing in 
the rockery. It is easily raised from seeds. 
SAPONARIA ( Fuller's Herb; Soap Wort). — These 
pretty plants grow in any good garden soil, and are 
useful for the edges of borders, shrubberies, rockeries, 
&c. All kinds, both annual, biennial, and perennial,, 
are easily raised from seeds in spring in gentle heat, 
or in autumn. The best known annual kind is 
S. calabrica, about 6 inches high, with beautiful small 
rosy blossoms in great profusion ; the white flowered 
variety alba is also pretty. S. ocymoides is an elegant 
trailing perennial forming dense tufts on the ground, 
and bearing panicles of red or pink flowers from May 
to August. There are several forms of it, that known 
as splendens being the best. It is an excellent plant 
for the rockery. S. officinalis, the “ Bouncing Bet ” 
of our waysides, grows 1 to 2 feet high, and has lilac 
or pinky-white blossoms in August and September, 
the double -flowered form {flore pleno) having blossoms 
like a small Carnation. 
SAXIFRAGA (Roclcfoil ; Breakstone). — A large 
and charming group of plants chiefly valuable for 
the rock garden, although several of the larger and 
stronger growing kinds are suitable for the flower 
border, and at least one ( S . peltata) is ornamental near 
the edges of ponds or streams. There are a few 
annual kinds, but they are scarcely worth attention. 
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