tion, a portion of matter not applicable to its own 
increase, and that such matter is poisonous to a 
succeeding crop of its own species, but not to others. 
Hence the necessity of a change of crop. This we 
shall notice in another place; suffice it here to say, 
that the Jasione perennis, either from exhaustion 
of the soil, or from its deposition of superfluous re- 
crements, really cannot be successfully grown in the 
same spot, year after year. 
This plant produces, in autumn, an abundance 
of suckers, all round the parent plant. These emit 
strong string-like roots, which not only descend 
directly downwards, but also produce lateral fibres, 
so as closely to occupy the whole body of soil, im- 
mediately round the old plant. All trace of the 
parent plant will be lost ; and these sucker roots, 
closely matted together, will oftentimes, in spring, 
if left undisturbed, gradually decay. The more 
luxuriant the increase, the greater the danger of 
disease. Thus they proceed, though with healthy 
appearance above ground, till perchance, some un- 
congenial day or night disclose their morbidity, 
and their withered leaves meet us as the knell of 
their departed promise. If grown in pots in the 
same state, frame protection will not avert this 
failure. Thus proceeds the disease. The remedy 
is easy. The young plants must be raised, in au- 
tumn, and planted singly, or at least not too closely 
together; and they will, as Parkinson would say, 
flourish to the delight of every beholder. The 
most suitable soil will be peat, or peat and loam. 
Aspect is of minor importance, so that the situation 
be tolerably dry. 
Loudon’s Ency. of PI. 188. 
