1 82 HARDY PERENNIALS 
our hardy Primulas. The reader is, however, 
advised to consult a hardy plant nurseryman and 
obtain advice as to a few easily grown kinds to start 
with, and gradual study and investigation will 
guide the way to the acquisition of a choice collection. 
Pulmonaria. — For the most part the Lung- worts 
are of rough and hardy appearance, although by 
no means lacking in beauty. Their spotted and 
mottled foliage and heads of reddish and blue 
flowers are just suited to positions under trees, 
damp shady places and alongside carriage drives or 
hedge banks. 
Pyrethrum. — Too well known to require descrip- 
tion, the Pyrethrums, single and double, are so 
extremely useful for cutting and for colour effects 
in the garden that every one desires at least a few. 
Speaking broadly we may say the Pyrethrum is 
perfectly hardy and easy to grow, and yet failures are 
frequent . A brief explanation of one or two aversions 
of the plant will point to the cause of the majority 
of the failures, and foremost among the aversions 
is disturbance and division in late Autumn and 
Winter. The proper time to transplant Pyrethrums 
is immediately after the main crop of flowers has 
run its course. New growth will then immediately 
be made and the plants will be well rooted before 
Winter. The only other time the plants may be 
disturbed is when new growth begins to appear in 
Spring, but this allows so short a time before the 
flowering period that only a few buds should be 
