HARDY HERBACEOUS PERENNIALS 65 
Linum Flavum.—Yellow Flax. <A hardy little plant 
with gaily-coloured blossoms. 
Gnothera Macrocarpa,—A dwarf evening Primrose 
with trailing stems on which the large flowers are 
freely produced. It is perhaps better known as Oe. 
MISSOULIENSIS. 
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 wits BLue FLowers 
Aconitum.—Monk’s Hood. Well-known, old-fashioned 
perennials, with poisonous roots. Among the best for 
this section are A. chinense and A. Napellus, 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. £. Ofiverianum. 
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 Caeruleum.—Jacob’s Ladder. An old- 
fashioned plant, worthy of inclusion in modern gardens. 
It blooms from early June to September. 
Catananche Cerulea.—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. 
E 
