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. ccelestis. The culti- 

 vation is similar to Aerides. 



Saccolabium. The Saccolabiums should be grown in 

 a warm house like Aerides. 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 Laelias 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. 



