RHYNCOSPERMUM 115 



dark-green leaves lying perfectly flat on the surface over 

 which it climbs. Other ornamental climbing sorts are P. 

 nigricans and P. scandens. It is doubtful whether several 

 plants included under Pothos which have not yet flowered 

 in cultivation really belong to that genus. Propagation by 

 cuttings. See also Chapter XIII (Aroids), p. 67. 



RHODOCHITON 



R. volubile is an attractive greenhouse climber from 

 Mexico, with cordate leaves, and pendent flowers with 

 reddish calyces and nearly black corollas, freely produced. 

 It succeeds in loam and peat. Propagation by seeds in 

 early spring or by cuttings of the young shoots in summer. 



RHUS 



A large genus of chiefly hardy trees and shrubs, widely 

 distributed, and celebrated for their poisonous properties. 

 R. Toxicodendron, the Poison Ivy of North America and 

 Japan, has large ternate leaves that colour well in autumn. 

 Unfortunately the slightest contact between any portion of 

 the plant and the bare skin of some people causes such a 

 severe and long-continued skin eruption that its planting 

 cannot be recommended. Formerly distributed as Ampe- 

 lopsis Hoggit. Propagation by seeds or root cuttings. 

 Plants in rich soil colour best in autumn. In America the 

 planting of Poison Ivy is prohibited. 



RHYNCOSPERMUM 



Fragrant, white-flowered, evergreen shrubs, natives of 

 Asia. R. (Trachelospcrmuni) jasminoideS) China and Japan, 



