Transcript Softwood anatomy - Wood Anatomy and Identification

Softwood anatomy
Longitudinal tracheids
Earlywood and Latewood
Latewood
Earlywood
EW-LW transition - abrupt
Latewood
Earlywood
EW-LW transition - gradual
Latewood
Earlywood
EW-LW transition - intermediate
Latewood
Earlywood
EW-LW transition - abrupt
Latewood
Earlywood
Latewood
Earlywood
Latewood
Earlywood
EW-LW transition - gradual
Latewood
Earlywood
Latewood
Earlywood
EW-LW transition - intermediate
Earlywood
Latewood
Earlywood
Latewood
EW-LW transition - abrupt
Earlywood
Latewood
EW-LW transition - gradual
Earlywood
Latewood
Growth ring width variation
Three very different growth rates
(Douglas-fir all shown at the same magnification)
Bordered pits
Inter-tracheid bordered pit
Bordered pits
Bordered pits – less common arrangements
Paired
Alternate
Longitudinal parenchyma
Longitudinal parenchyma
Resin canals
Resin canals
Large diameter
Small diameter
Resin canals
Non-resinous
Small resin canals
Large resin canals
Resin canals
Non-resinous
Small resin canals
Large resin canals
Resin canals
Traumatic
Paired
Multiple
Rays – uniseriate rays
Uniseriate rays
Rays – fusiform rays
Fusiform ray
(including
horizontal
resin canal)
Rays – fusiform rays
Fusiform ray
(including horizontal
resin canal)
Spiral thickening
Spiral thickening on
inside of cell wall
Spiral thickening
Spiral thickenings
Cross-field pitting
Cross-field pitting
Lodgepole pine
Red pine
White spruce
Douglas-fir
Cross-field details
bordered pits
between ray
tracheids
ray
tracheid
dentations
bordered pits
between ray
tracheids and
longitudinal
tracheids
semi-bordered pits