The savanna is
an area of tropical, wooded grassland found in the drier regions of tropical
wet and dry climate, an intermediate stage between open grassland and
forest. Widely scattered, short, flat-topped trees dot the landscape.
The grass is tall and grows in bunches. Grass is different from other
green plants. In most plants, the zones of growth of new plant tissue
are at the tips of leaves, shoots, and roots. In grass, new tissue grows
from the base of the leaves. When animals eat the top portion of the grass
plant, they do not stop it from growing. Underground runners allow grass
to spread over a wide area, and a fibrous mat of roots enables grass to
withstand drought and fire. Grasses are pollinated by the wind; they are
not dependent upon insects that might not be able to withstand long periods
of drought. New grass grows at the start of each rainy season but soon
withers and dies during the dry period. Fire plays an important role in
removing dead material so new plants can grow.