HARDY HERBACEOUS PERENNIALS 65 



Linum F/avum. Yellow Flax. A hardy little plant 

 with gaily-coloured blossoms. 



CEnothera Macrocarpa. A dwarf evening Primrose 

 with trailing stems on which the large flowers are 

 freely produced. It is perhaps better known as Oe. 

 missouriensis. 



The majority of the above flowers are pure yellow in 

 colour. Variety would of course be given by including 

 others varying from deep orange to pale sulphur. An 

 extended list is impossible in the limited space, the object 

 being to suggest a few flowers in the principal colours ; 

 however, there will be no difficulty in finding others 

 equally suitable. 



PLANTS WITH BLUE FLOWERS 



Acomtum. Monk's Hood. Well-known, old-fashioned 

 perennials, with poisonous roots. Among the best for 

 this section are A. chinense and A. Nape/Ius, the former 

 continuing in bloom until the end of September. 



Delphiniums. 



Eryngium. Sea Holly. These strong growing plants, 

 with their beautiful steel-blue stems and foliage, should 

 be in every collection. The flower heads can be dried 

 and used for winter decoration. E. Oliverianum. 



Scabiosa Caucasica. On any but very cold soils this is 

 a true perennial. The flowers are abundantly produced 

 on long stalks, and are useful for cutting. 



Polemonium Cxruleum. Jacob's Ladder. An old- 

 fashioned plant, worthy of inclusion in modern gardens. 

 It blooms from early June to September. 



Catananche Cxrulea. Blue Cupidone. An easily grown, 

 free flowering plant. The colour is especially pleasing. 



Centaurea. Knapweed. One of the best of this family 

 is C. montana, a variety with cottony leaves, and a pro- 

 fusion of flowers not unlike the blue Cornflower. 



