54 ROGK GARDENING FOR AMATEURS 



and there a Yucca may be planted with good effect. 

 Yucca angustifolia is one of the prettiest, and may be 

 given a choicer position than Adam's Needle (Yucca 

 gloriosa), which is much more vigorous and should be 

 grouped on the upper edge of the rockery. 



