128 THE CULTURE OK POT-PLANTS 



warm greenhouse during the winter, when they should be 

 kept fairly dry. They are not infrequently seen in rooms 

 in the summer. They can be propagated by means of 

 offsets. 



Phormium tenax (New Zealand Flax). — Hardy in 

 the southern counties, but requiring the protection of a 

 greenhouse in the north. It has long, flag-like leaves which 

 in some varieties are purple or striped with white or yellow. 

 The flowers are small, yellow or orange. A fine pot-plant 

 of easy culture. When it grows too large it can be divided 

 in spring. 



Yucca. — The best species for pots are V. aloifolia and 

 K filamentosa. Of both there are several varieties with 

 coloured or variegated leaves. They can be grown in an 

 ordinary greenhouse, and can be propagated by division of 

 the crowns or by cuttings of the roots. 



