PERSONALITY OF PLANTS 
withered and dead, but with the coming of the 
stars, they open up to show conspicuous white 
or light-tinted interiors. A flower like the 
Silene also exhales a rich, sensuous odor, which, 
with its light colour, serves to attract such in- 
sects as are abroad at night. 
Sycamore and Lime trees have humble allies 
in the tiny mites which live in the retreats built 
of hairs to be found at the places where the veins 
of the leaves fork. During the day they hide 
away from sight, but at night they come out and 
scour the leaves clean of noxious bacteria and 
fungus spores. 
Pollen of different plants, when examined 
under the miscrope, reveals wonderful facts 
about the reciprocal relations which exist be- 
tween plants and insects. Wind-fertilized 
plants are nearly always without any special 
beauty of form, colour or scent, while plants 
which are fertilized by insects are most always 
conspicuous, brightly coloured and highly 
scented. In the same way, pollen of the Hazel, 
Birch, and Balsam Poplar, which is carried by 
the wind, is small, light, practically spherical 
and devoid of proturberances. Pollen of the 
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