Sarcanthus.—Allied to Saccolabium, and having similar cultural requirements.
Sarcochilus.—The species of Sarcochilus need to be grown in Sphagnum-moss in the intermediate house.
Satyrium.—Terrestrial Orchids chiefly from South Africa, needing greenhouse treatment. The plants must be kept dry during the resting period.
Schomburgkia.—A strong-growing genus, requiring similar treatment to Lælias and Cattleyas. The best position for them is a sunny situation in the intermediate house.
Scuticaria.—The Scuticarias are handsome, bulbless species, with long, terete, pendulous leaves, and showy, yellowish flowers, blotched with purple. They should be grown on rafts, or in baskets suspended in the intermediate house.
Selenipedium. See Cypripedium.
Sobralia.—The species of Sobralia are strong-growing, terrestrial Orchids with reed-like stems, requiring abundance of water during the period of growth. Intermediate house. S. macrantha and its white variety are best known.
Sophronitis.—A dwarf genus, best known by S. grandiflora, which has scarlet flowers, and has been used for crossing with Lælias and Cattleyas. All the species are cool-house plants, needing cultivation in pans or baskets suspended from the roof. The hybrids succeed best in the intermediate house.
Spathoglottis.—Terrestrial Orchids of similar growth to Bletia, requiring a pronounced resting period. Intermediate house. Rest dry.
Stanhopea.—A fine genus, with large, pendulous, wax-like flowers of aromatic odour. They should be grown in baskets in the intermediate house. Rest rather dry in a cool house or vinery.