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plant. You will find it however among 
the Siliquofe, and its expanded calyx, the 
erect claws of the petals, the gland between 
the (hort Jlamina and \kepijlillum, and be- 
tween the longer and the calyx, declare it to 
be of the genus Sinapis. 
Thefpecies are diftinguifhed by the pods; 
but, as thefe have not yet appeared, we muft 
find fome other mark. There have been 
difcovered, in all, 17 different fpecies of &'- 
napis y but three of which grow wild in this 
kingdom: thefe are S. nigra> black Muftard, 
S. alba> white Muftard, and 5. arvenfis, wild 
Muftard or Charlock. Now the firft my 
friend Relhari has thus characterized , caults 
*ualde rimofis, r ami's dijlaniibm expanfis; which 
defcription does not apply tc the plant in 
your hand: in the fecond, the leaves are 
deeply cut and jagged, and the ftem finely 
grovedj befides, neither of thefe bloom in 
this month; it muft therefore be the Sinapis 
arvenjis. There is another pernicious corn- 
weed which you will find in flower in July, 
that much refembles this Charlock: it is the 
Raphanus raphanijlrum; but it is not fo tall 
a plant, is of a lighter green, the branches 
are longer in proportion, and the leaves are 
pinnatifid. The flowers of this isdild Radifi 
are 
