104 PRESENT-DAY GARDENING 
intermediate house. R. secunda has rose-coloured flowers ; 
most of the others are white, and they are generally fragrant. 
Rhyncostylis.—These are warm-house plants, which are 
known usually as Saccolabiums in gardens. The commoner 
species is R. retusa, with fine racemes of blush-white flowers, 
spotted with purple; and the blue R. celestis. The culti- 
vation is similar to Aérides. 
Saccolabium.—The Saccolabiums should be grown in 
a warm house like Aérides. S. bigibbum and others of its 
class are pretty, dwarf species, with yellowish flowers spotted 
with purple and having a white lip. 
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 Leelias and Cattleyas. The best posi- 
tion 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. 
