io6 HERBACEOUS GARDEN 
have these same plants spotted generally along 
the whole length. You don’t want to walk 
along the border meeting perpetually the same 
face, till at last you avert your eyes when you 
come to the same plant again and say, “ Oh, 
Daisy, I really can’t go on bowing to you 
any more ! ” 
Another danger is that of allowing certain 
rampant-growing plants to take possession of 
the borders. Achillea ptarmica is a precious 
plant of useful height, and one that remains 
fresh and blooming for months ; but— and it is 
a very big but— it will take possession of the 
entire border if allowed to, and must be 
ruthlessly thinned out each year, and must 
never be planted near any new plant, or one 
of not so pushing a habit that is to be estab- 
lished. Pyrethrum uliginosum is another robber, 
and will extend on all sides until, after three 
or four years, it will take the united efforts of 
three men to move a clump ; but so beautiful 
is it in October, when but little else is left in 
flower, that it cannot be altogether denied a 
place. The yellow scabious growing 12 to 
15 feet high, though an important plant to 
grow in one of these large borders, spreads and 
robs the ground unmercifully in the process. 
So also will the white willow-herb, and for 
