JASI'ONE PEREN'NIS. 
PERENNIAL SHEEP’S SCABIOUS. 
Class. Order. 
PENTANDRIA. MONOGYNIA. 
Natural Order. 
CAMPANOLACEiE. 
Native of 
Height. 
Flowers in 
Duration. 
Introduced 
France. 
1 foot. 
June, July. 
Perennial. 
in 1787. 
No. 443. 
The Greek word, jasione, is of uncertain origin, 
and the identity of the plant to which it was appli- 
ed, is equally doubtful. It has been said to be 
derived, in part, from ion, a violet, on account of 
its blue flowers; but we have Pliny’s authority for 
the ancient Jasione having had white flowers. 
When grown in pefection, the Jasione perennis 
is a neat and attractive flower, but it will not unfre- 
quently be met with in a weakly state; and more- 
over, be oftentimes entirely lost, though a few days 
previously, it had exhibited vigour and increase. 
In fact, the more luxuriantly it has grown, the more 
precarious is its existence, without due attention 
has been paid to its culture. 
Here we are reminded of an interesting inquiry 
now going on, regarding the cause that demands 
a rotation of crops. Formerly, it was believed that 
each species of vegetable absorbed a specific ingre- 
dient of the earth, and thereby deprived it of the 
requisite quantity of the peculiar ingredient neces- 
sary for the healthy growth of another crop of such 
species. Late physiologists, however, maintain that 
the plant discharges, from its roots, after elabora- 
