186 TYPES OF BRITISH PLANTS 
the leaves will show the difference at once. When they 
open, you will see that in the upper flowers of the bunch 
are the pistils with crimson, tufted 
heads, and in the lower are many 
stamens with long filaments, which 
hang like tassels far outside the flower, 
and produce abundance of pollen. As 
one would expect from such an arrange- 
ment, insects are not the agents to 
carry the pollen forth, but the wind, 
and for this method the tufted heads 
of the pistils are admirably adapted, 
for any pollen blown to them is caught 
and held. One may note also that the 
pollen is kept beneath its own pistils, 
which would show that the plant has 
a preference for cross-fertilisation. 
The Rose tribe is fairly well marked, 
but is nothing like so considerate to 
the botanist who wants definite group- 
ing as the third chief division of our 
chapter, the Pea and Bean, or Clover 
tribe. These all have a most marked 
and peculiar formation of the petals, and though the 
flowers may be solitary and large, or small and clustered, 
there is never any doubt, amongst our English flowers, 
where they must be placed. The ordinary Sweet-pea of 
the gardens shows the arrangement very well, and if 
you consult the illustration, or, better still, a living 
example, you will realise its ingenuity. One petal is 
very much larger than the rest, and stands well back 
from them when the flower is expanded, though when 
in bud it tenderly wraps them all round. This is known 
SALAD BURNET. 
