CULTIVATED ORNAMENTAL SHRUBS. 137 



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

 grant pittosporum (Pittosporum tobird), 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 (Zamia integrifolia] of southern Florida add to the 

 number of decorative evergreen plants. 



