Scabiosa atropurpurea: hardy, 1 to 2 ft., rose, white, lilac, crimson, &c.
Schizanthus pinnatus: hardy, 1 to 2 ft., purple-lilac, prettily blotched; curiously lobed flowers.
Schizopetalon Walkeri: hardy, 1 ft., white, sweet-scented at night; curiously fringed petals.
Senecio elegans: half-hardy, 1½ ft., white, rose or purple; the various double forms are showy.
Silene pendula: hardy, 1 ft., bright rose pink; very showy in masses; var. compacta forms close dense tufts.
Silene Pseudo-Atocion: hardy, 1 ft., rose pink; free-flowering.
Specularia Speculum: hardy, 6 in., reddish-violet; free-flowering.
Sphenogyne speciosa: half-hardy, 1 ft., orange-yellow, with black ring around the disk.
Statice Bonduelli (Sea Lavender): half-hardy, 1½ ft., yellow.
S. Limonum: bluish purple.