6 THE VEGETABLE WORLD. 
supported rear their 
lofty heads, charged 
with their fan-like tuft 
of leaves (Fig. 8). 
Some acquaintance 
with the form of roots 
will soon find its prac- 
tical uses. In watering 
a plant, it is necessary 
to pour in the water at 
the foot of the stem, if 
it is tap-rooted ; on the 
contrary, if the root is 
fasciculated, it should 
be poured out at some 
distance from the stem, 
in order that the 
spreading roots may 
receive the benefit of 
the water. In the 
cultivation of plants 
we manure the sur- 
face of the soil, or of 
the deeper beds, ac- 
cording as the plant 
has tap roots or fas- 
ciculated roots. In 
scientific farming a 
plant with fasciculated 
roots which exhausts 
the soil on the surface, 
is succeeded by a plant 
with a tap root, which 
seeks it nourishment 
2 at a greater depth in 
the soil. 
This diversity in the 
structure of roots is not 
Fig. OE soy at pate entran ntrance of ‘oe heel choice tsi 
Jardin sm - atthe the work of chance, 
