CULTIVATED ORNAMENTAL SHRUBS. 137 



tection against continued rains and spells of extreme cold. The fra- 

 grant pittosporum {P'dtcmporum tohira)^ jessamines, cape jessamine 

 {Gardenia) are perfectly hardy. The century plant {Agave americana) 

 not infrequently puts forth its candelabra-like flowering- shafts, and 

 yuccas {Yucca treculeana^ etc.) from Mexico and the adjacent Texan 

 region, and the tropical so-called sago palm {Cycas revoluta) and 

 arrowroot palm {Zainla integrlfolla) of southern Florida add to the 

 number of decorative evergreen plants. 



