External Wood Features
hi-res links (requires broadband)
Curtis, Lersten, and Nowak 2002 rev. 2019
Pine (
Pinus
) tight knot.
Pine (
Pinus
) wood showing dwarf branch tight knots.
Pine (
Pinus
) wood tight knot.
Pine (
Pinus
) board with tight knots.
Pine (
Pinus
) board with showing pith of trunk and a side branch.
Pine (
Pinus
) board with two lateral branch tight knots.
Pine (
Pinus
) board with pith in both main stem and lateral branch, and also dwarf branch knots.
Pine (
Pinus
) board showing dwarf branch knots.
Pine (
Pinus
) board with pit and dwarf branch bud knots.
Pine (
Pinus
) transition from tight to loose knot.
Pine (
Pinus
) loose knot.
Pine (
Pinus
) loose knot.
Pine (
Pinus
) loose knot.
Loose knot in Pine (
Pinus
).
Pine (
Pinus
) loose knot (the hole).
Cross section of non-porous woods, from top: western hemlock (
Tsuga heterophylla
), scrub pine (
Pinus virginiana
), white fir (
Abies concolor
, and redwood (
Sequoia sempervirens
.
Woody oak (
Quercus
) stem cross section.
Wood block showing cross, radial, and tangential sections.
