Page 2 - LN-ANATOMY OF FLOWERING PLANT

During the formation of leaves and elongation of stem, some cells, left behind from
shoot apical meristem, constitute the axillary bud. These buds are present in the axil
of leaves and are capable of forming a branch or a flower.

(b) Intercalary Meristems The meristem which occurs between mature tissues is
known as intercalary meristem. They occur in grasses and regenerate parts removed
by the grazing herbivores.
Both apical and intercalary meristems are primary meristems because they appear
early in life of a plant and contribute to the formation of the primary plant body.
These meristems are usually responsible for growth in length and present mostly at
the base of node (e.g., Mint), base of internode (e.g., Stem of wheat and grasses) or
at the base of leaf (e.g., Pinus).
(c) Lateral Meristems The meristems that occurs in the mature regions of roots and
shoots of many plants. These meristems produce woody axis and appear later than
primary meristem is called the secondary or lateral meristem.
They are cylindrical meristems. Some examples of lateral meristems are fascicular
vascular cambium, interfascicular cambium and cork cambium. These are
responsible for producing the secondary tissues.