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CH. 8 Structure of Woody Plants (Woody Plants (Chestnut trees, Sycamore…
CH. 8 Structure of Woody Plants
Vascular Cambium
Initiation
Fusiform Initials
long tapered cells
regular horizontal rows
non storied non cambium
storied cambium
axial system
Ray Initials
short vertical rows
radial system
Arrangement of Cambial Cells
Types of Wood Cells
Hardwood
Angiosperms
Eudicots
Softwood
Bald Cypress tree
Growth Rings
"annual ring"
early wood + late wood
late wood- growth during summer
lower amount of vessels
early wood- spring wood growth
lots of wide vessels
Heartwood
darker inner wood
Sapwood
moister, lighter outer region of log
new layer formed every year by vascular cambium
Reaction Wood
due to drooping
forms fibers built for "stress"
Secondary Growth in Roots
Anomalous Secondary growth
Unusual primary growth
Primary tissues
Vascular Bundles
Cortex
Pith
Epidermis
Leaves
Secondary Tissues
Secondary Xylem (WOOD)
formed from vascular cambium
Secondary Phloem (BARK & CORK)
formed from vascular cambium
new cork cambium or "phellogen"
PERIDERM
PHELLODERM
CORK CAMBIUM
CORK CELLS
Woody Plants
Chestnut trees
Sycamore trees
Firs
Pine trees
Azaleas
Rose Shrubs
Oleanders
