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Leaves (Morphology and Anatomy of Other Leaf Types (Succulent,…
Leaves
Morphology and Anatomy of Other Leaf Types
Succulent
Sclerophyllous
Leaves of Conifers
Bud Scales
Spines
Tendrils
Leaves with Kranz Anatomy
Insect traps
External Structure of Foliage Leaves
function: photosynthesis
leaf blade
AKA lamina
flat, light harvesting
dorsal surface
lower side of blade
larger veins
AKA abaxial side
ventral surface
upper side of blade
smooth
petiole
AKA stalk
holds blade into light
sessile leaf
no petioles
sheathing leaf base
leaf base wraps around stem
Initiation and Development of Leaves
Basal Angiosperm
Eudicots
Monocots
Internal Structure of Foliage Leaves
Epidermis
transpiration
loss of water
flat, tubular epidermal cells
guards cells
trichomes
coating of cutin and wax
Mesophyll
palisade parenchyma
layer of cells on upper surface of leaves
main photosynthetic tissue
Spongy Mesophyll
lower portion of leaf
open, loose aerenchyma that permits CO2
Vascular Tissue
midrib
AKA midvein
Leaf Blades
Simple leaf
blade of just one part
numerous shapes
Compound Leaf
blade divided into several parts
leaflets
small blades
petiolule
attaches leaflet to compound leaf
Palmately Compound
all leaflets are attached at the same point
Pinnately Compound
leaflets attach individually along rachis
