88 FAMILIAR GARDEN FLOWERS. 



year round. Some half-dozen species, of which Opuntia 

 Rafinesquiana is an example, may be planted on the open, 

 rockery to run the race with other hardy plants ; but the 

 ■ situation must be dry and warm, and lodgment of water in. 

 winter must be carefully guarded against. 



The following are the best of the cactus family for an 

 amateur's garden : — Mammillaria applanata, M. gracilis, 

 M. caput-medusa, M. decipiens, Echinocactus Simpsoni, 

 Cerens grandiflora, C. flagilliformis, Echinocactus pecti- 

 natus, Phyllocactus Ackermanni , P. anguliger, Opuntia 

 monacantha, 0. curassavica. With these by all means 

 place a Stapelia, which loves a warm window and judicious 

 neglect. 



