Скачать или смотреть Structure of typical leaf | neet biology | class 11th biology |

Part of a leaf (Phyllopodium):
A leaf is made up of three parts -
(1) Leaf blade or lamina (2) Petiole (3) Leaf base
 Leaf blade or lamina (Epipodium): It is thin, expanded, green and terminal part of the leaf which
is specialized to perform photosynthesis. Lamina bears network of Veins and Veinlets. Veins
provide rigidity to the leaf base and act as channels of transport for water, minerals and food
materials.
 Petiole (Mesopodium): It is a cylindrical part, which bears the
Lamina at its tip. If the petiole is absent it is termed sessile if leaf
having petiole it is called petiolate. Long thin flexible petiole allow
leaf blades to flutter in wind there by cooling the leaf and bringing
fresh air to leaf surface.
 Leaf base (Hypopodium): It is the lowest part of leaf by which the
leaf is joined to the node of the stem bear two lateral leaves like
stipules. In many legumes it is swollen. The swollen leaf base is
called pulvinus. e.g. Cassia fistula, Mimosa pudica
(Leguminous plants). In monocotyledons the leaf
base spread as sheath like grasses,
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