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leaf - Coggle Diagram
leaf
parts of leaf
leaf base
lowest part attached to node of stem
sheath
exapnded in form of sheath in monocotyledons
stipules
2 lateral outgrowns absent in monocots
midrib
middle of leaf blade from its base to apex
petiole
stalk of leaf by which it is attach to stem to get more sunlight
Lamina / leaf blade
it has no.of veins through its surface
structure of leaf
flattened structure borne on the stem
develops at node and bears a bud in its axial
arranged in acropetal order
Types of leaf - veneation
arrangement of vein / veinlets
reticulate
when veinlets form a network leaves of dicotyledonous plants
Ex : peas
Pinnate
strong midrib with lateral veins run from centre towards margin of leaf
Ex : neem
Palmate
= strong veins arising from petiole to margin
Ex : cucumber
parallel veins
when the vein run parallel to each other within lamina - monocots
Ex : banana
pinnate
lateral veins from parallel margin
Ex : canna
Palmate
veins from petiole parallel leaf blade
Ex : palm leaf