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Leaf Structure (Sclerophyllous Foliage (conifer leaves (thick), produces…
Leaf Structure
Sclerophyllous Foliage
produces excess sugars
conifer leaves
thick
bud scales
spines
tendrils
insect traps
External Structure Foliage Leaves
Leaf blade
aka lamina/ ventral/ adaxial
light harvesting
smooth
dorsal surface
abaxial
large veins protrude
lower side of leaf
petiole
stalk of the leaf
holds the leaf out into light
helps prevent self shading of leaf blades
sissile leaf
thin so self shading is not an issue
might not have a petiole
sheathing leaf base
leaf type
simple
single leaf blade
compound
many small blades called leaflets
leaflets attached to a petiolule
by the rachis
Succulent leaves
desert plants
water conservation
few air spaces in mesophyll
Internal Structure of Foliage Leaves
epidermis
transpiration
loss of water
mesophyll
collectively the ground tissue inside the epidermis
palisade
spongy
vascular tissue
eudicot leaf
midrib
lateral veins
bundle sheath
primary xylem
primary phloem
bundle sheath extension
Leaf Developement
leaves are developed though the activity of a short apical merstem
leaf primordium
forms out of apical meristem
start to a new leaf
monocot
