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OTHER WOOD DIAGNOSTIC FEATURES - Coggle Diagram
OTHER WOOD DIAGNOSTIC FEATURES
SECRETORY STRUCTURES
INTERCELLULAR SECRETORY
SPACES
INTERCELLULAR CAVITIES
sacs/pouches
surrounded by
secretory epithelium
types
gum cavity
resin cavity
INTERCELLULAR CANALS
elongated spaces
surrounded by secretory
epithelium
can be
axial/vertical or radial/horizontal
disposition
normal/natural or
pathologic or
traumatic
traumatic
gummosis
breakdown/degeneration of cells
types
gum canal
resin canal
INTRECELLULAR SECRETORY SPACES
LATICIFERS
structure
contain & produce
latex
types
Articulated Laticiferous Tube
chain of cells
wall separate - intact/perforated/dissolved
latex vessels
resemble prosenchymatous vessels
Non-Articulated Laticiferous Tube
enlarged tube cells
branched thu out plant axis
single cells
latex cells
when pass thru vascular ray
latex tubes
SECRETORY CELLS
applied to cells
nearly normal size
somewhat enlarged
contain oil, resin, or mucilage
EXTRACTIVES EFFECT
Odor
Melicaceae
Spanish Cedar & Kalantas
resinous odor
tobacco boxes
pencils
Permeability
block intercellular spaces & perforations
less permeable or
impremeable
consideration
cooperage - barrels & casks
wood preservation
Durability
add strength
denser
toxic to destructive orgs
less permeable to moisture
Luster
less lustrous
TYLOSES
foam-like or sac-like deposits
vessels
shiny obstructions
block pores
partially or completely
detrimental or beneficial
White oak heartwood
tightly plugged vessels
whiskey barrels
red oak
open-vesseled
avoided
affects seasoning & preservation
CRYSTALS
valuable in wood identification
usually found
axial parenchyma
ray cells
frequently found
septate fibers
tyloses
modifications
presence of crystals
enlarged cells or
idioblasts
changes in the cell wall
cause crystalliferous cells to become sclerosed
presence of crystals
varied size and shape in one cell
types
Druse
spherical clusters
attached to cell wall
free in the cells
Raphides
bundle of needle shaped
tend to fill the whole cell
Elongated & Rod-like
elongated
pointed/square ends
4x as long as broad
rod-like
2x as long as broad
squared ends
Acicular
needle-shaped
small
free in the cells
not fill the cells
Crystal Sand
granular mass
very fine small crystals
Rhomboidal, Square
or Diamond-shaped
most common of all crystal types
may occur
singly
2 or more per cell
SILICA
timber - many forms
inclusions
more common occurrence
granules are smaller than the lumina of the cels
has wrinkled or uneven surface
aggregates
concretions
corpuscles
bodies
Vitreous Silica
silica deposited
lining on cells walls
completely fills the lumen of the containing cell
deleterious effect
wood working tools
make blades dull
sawmills - cocolumber
retip tools
stellite tip
carbide tip