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Woody Plants (Vascular Cambium (Fusiform Initials (Periclinal Wall…
Woody Plants
Vascular Cambium
Initiation
Fascicular Cambium
Interfascicular Cambium
Fusiform Initials
Periclinal Wall
Produces 2 elongate cells.
Anticlinal Walls
Perpendicular to cambiums surface.
Axial Xylem
Axial Phloem
Ray Initials
Phloem Rays
Xylem Rays
Arrangement of Cambial Cells
Stored Cambium
Horizontal Rows
Nonstoried Cambium
Irregular
No horizontal pattern
Outer Bark
Cork & Cambium
Cork Cambium
Phellogen
Outer Bark
Tissues outside innermost cork cambium
Inner Bark
Secondary Phloem
Between vascular cambium & innermost cork cambium
Cork Cell
Phellem Cell
Periderm
Lenticels & Oxygen Diffusion
Lenticel-Producing Regions
Active
Initiation of Cork Cambia
Secondary
Xylem
Wood Cells
Axial System
Derived from fusiform initials
Radial System
Derived from ray initials.
Hardwoods
Basal Angiosperms
Eudicots
Softwoods
Few or no fibers.
Bald-Cypress
Upright Cells
Connection with axial cells.
Procumbent Cells
No connection with axial cells.
Ray Tracheids
Horizontal
Rectangular Cells
Secondary Walls
Circular Bordered Pits
Protoplasts
Growth Rings
Early Wood
Spring Wood
Wide Vessels
Late Wood
Summer Wood
Lower Proportion of Vessels
Annual Ring
1 Year's Growth
Growth Ring
Diffuse Porous
Vessels throughout
Ring Porous
Restricted Vessels
Heartwood
Dark Wood
Becomes wider w/ age
Reaction Wood
Upper side of branch
Tension Wood
Gelatinous Fibers
Sapwood
Lighter, moister
Outer Region
New Layers
Formed yearly
Phloem
Axial System
Conduction up & down stem
Contains
Sieve Tube Members
Companion Cells
Angiosperms
Sieve Cells
Conifers
Radial System
Anomalous Forms of Growth
Anomalous Secondary Growth
Roots of Sweet Potatoes
Included Phloem
Unequal Activity
Secondary Growth in Monocots
Unusual Primary Growth
