Quantcast Table 2-3. Classification of Species with Respect to Heartwood Permeability

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TABLE 2-3
Classification of Species with Respect to Heartwood Permeability
Softwoods
Group 1. Heartwood Easily Penetrated
Basswood
Bristlecone pine
Beech (white heartwood)
Pinon pine
Black gum
Ponderosa pine
Green ash, Pin cherry
River birch, Red oaks
Slippery elm, Sweet birch
Tupelo gum, White ash
Group 2. Heartwood Moderately Difficult to Penetrate
Black willow
Douglas-fir (Pacific-coast type)
Chestnut oak
Jack pine
Cottonwood
Loblolly pine
Largetooth aspen
Longleaf pine
Mockernut hickory
Norway pine
Silver maple
Shortleaf pine
Sugar maple
Western hemlock
Yellow birch
Group 3. Heartwood Difficult to Penetrate
Hackberry
Eastern hemlock
Rock elm
Engelmann spruce
Sycamore
Lowland white fir
Lodgepole pine, Noble fir
Sitka spruce, Western larch
White fir, White spruce
Group 4. Heartwood Very Difficult to Penetrate
Beech (red heartwood)
Alpine fir
Black locus
Corkbark fir
Chestnut
Douglas-fir (Intermountain type)
Redgum
Northern white cedar
White oaks (except
Tamarack
chestnut oak
Western redcedar
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