| IAWA Feature# |
Feature Code Options |
| ANATOMICAL IDENTIFICATION FEATURES |
|
| Growth Rings |
|
| 1 Growth ring boundaries distinct |
|
| 2 Growth ring boundaries indistinct or absent |
|
| Porosity |
|
| 3 Wood ring-porous |
|
| 4 Wood semi-ring-porous |
|
| 5 Wood diffuse-porous |
|
| Vessel arrangement |
|
| 6 Vessels in tangential bands |
|
| 7 Vessels in diagonal and / or radial pattern |
|
| 8 Vessels in dendritic pattern |
|
| Vessel groupings |
|
| 9 Vessels exclusively solitary (90% or more) |
|
| 10 Vessels in radial multiples of 4 or more common |
|
| 11 Vessel clusters common |
|
| Solitary vessel outline |
|
| 12 Solitary vessel outline angular |
|
| Tangential diameter of vessel lumina |
|
| Mean tangential diameter of vessel lumina |
|
| 40 <= 50 µm |
|
| 41 50 - 100 µm |
|
| 42 100 - 200 µm |
|
| 43 >= 200 µm |
|
| 45 Vessels of two distinct diameter classes, wood not ring-porous |
|
| Vessels per square millimetre |
|
| 46 <= 5 vessels per square millimetre |
|
| 47 5 - 20 vessels per square millimetre |
|
| 48 20 - 40 vessels per square millimetre |
|
| 49 40 - 100 vessels per square millimetre |
|
| 50 >= 100 vessels per square millimetre |
|
| Tyloses and deposits in vessels |
|
| 56 Tyloses common |
|
| 57 Tyloses sclerotic |
|
| 58 Gums and other deposits in heartwood vessels |
|
| Wood vesselless |
|
| 59 Wood vesselless |
|
| Axial parenchyma |
|
| 75 Axial parenchyma absent or extremely rare |
|
| Apotracheal axial parenchyma |
|
| 76 Axial parenchyma diffuse |
|
| 77 Axial parenchyma diffuse-in-aggregates |
|
| Paratracheal axial parenchyma |
|
| 78 Axial parenchyma scanty paratracheal |
|
| 79 Axial parenchyma vasicentric |
|
| 80 Axial parenchyma aliform |
|
| 81 Axial parenchyma lozenge-aliform |
|
| 82 Axial parenchyma winged-aliform |
|
| 83 Axial parenchyma confluent |
|
| 84 Axial parenchyma unilateral paratracheal |
|
| Banded parenchyma |
|
| 85 Axial parenchyma bands more than three cells wide |
|
| 86 Axial parenchyma in narrow bands or lines up to three cells wide |
|
| 87 Axial parenchyma reticulate |
|
| 88 Axial parenchyma scalariform |
|
| 89 Axial parenchyma in marginal or in seemingly marginal bands |
|
| Rays |
|
| Ray width |
|
| 96 Rays exclusively uniseriate |
|
| 97 Ray width 1 to 3 cells |
|
| 98 Larger rays commonly 4 - to 10 seriate |
|
| 99 Larger rays commonly > 10-seriate |
|
| 100 Rays with multiseriate portion(s) as wide as uniseriate portions |
|
| Aggregate rays |
|
| 101 Aggregate rays |
|
| Rays per millimetre |
|
| 114 <= 4 / mm |
|
| 115 4-12 / mm |
|
| 116 >= 12 /mm |
|
| Storied structure |
|
| 118 All rays storied |
|
| 119 Low rays storied, high rays non-storied. |
|
| 120 Axial parenchyma and / or vessel elements storied |
|
| 121 Fibres storied |
|
| 122 Rays and / or axial elements irregularly storied |
|
| Secretory elements and cambial variants |
|
| Oil and mucilage cells |
|
| 127 Axial canals in long tangential lines |
|
| 128 Axial canals in short tangential lines |
|
| 129 Axial canals diffuse |
|
| 130 Radial canals |
|
| 131 Intercellular canals of traumatic origin |
|
| PHYSICAL IDENTIFICATION FEATURES |
|
| Specific gravity |
|
| 193 Basic specific gravity low, <= 0.40 |
|
| 194 Basic specific gravity medium, 0.40-0.75 |
|
| 195 Basic specific gravity high, >= 0.75 |
|
| Heartwood colour |
|
| 196 Heartwood colour darker than sapwood colour |
|
| 197 Heartwood basically brown or shades of brown |
|
| 198 Heartwood basically red or shades of red |
|
| 199 Heartwood basically yellow or shades of yellow |
|
| 200 Heartwood basically white to grey |
|
| 201 Heartwood with streaks |
|
| 202 Heartwood not as above |
|
| Odour |
|
| 203 Distinct odour |
|
| 204 Hardwood florescent |
|
| Burning splinter test |
|
| 217 Splinter burns to charcoal |
|
| 218 Splinter burns to a full ash: Colour of ash bright white |
|
| 219 Splinter burns to a full ash: Colour of ash yellow-brown |
|
| 220 Splinter burns to a full ash: Colour of ash other than above |
|
| 221 Splinter burns to a partial ash |
|