88 PRESENT-DAY GARDENING 



green, pinnate leaves and flowers in large corymbs, and 

 may be treated as a greenhouse climber. It is propagated 

 by cuttings of half-ripened wood, inserted in heat during 

 spring, and is of easy cultivation. 



CELASTRUS 



Staff-tree. Climbing evergreen or deciduous shrubs. 

 The free-growing C. scandens is excellent for covering 

 bowers or trellis work. It has terminal racemes of yellowish 

 flowers, succeeded by ornamental yellow fruits. C. articu- 

 latus is equally valuable. They thrive in ordinary soil, and 

 are best increased by layering the young growths in autumn. 

 There are also greenhouse and stove species, which are 

 propagated from cuttings of ripened wood ; but these are 

 little cukivated. 



CEREUS 



The climbing species of Cereus are all night flowering. 

 They cling by means of aerial roots, and where the con- 

 ditions are favourable the stems grow many feet in 

 length. They are happiest when trained against a wall in 

 a lean-to house, but they do well enough when fixed about 

 a pillar or along a rafter in a warm house. Of course they 

 must be in a position where they will get plenty of direct 

 sunlight. They root freely in an open loamy soil, in which 

 brick rubble has been mixed. The best known are C. 

 fulgiduSj C. grandiflorus, C, Lemairii, C. Macdonaldia, C. 

 Napoleonisy C. nycticalus, and C. triangularis. 



CEROPEGIA 



A widely-distributed genus in the tropics. All the species 

 are perennial, with a tuberous rootstock, twining stems, and 



