Pine Tree Bark Identification: 9 Pines and Look-Alikes

Pine bark is usually thick, scaly and broken into plates or ridges on a mature trunk, while young pines often have smooth bark; Wikipedia's genus article says most pines have thick, scaly bark and a few have thin, flaky bark. Colour runs from gray and dark brown to the orange and cinnamon plates of some western and southern pines.

Two habits make pine bark easier to read than most:

• The top differs from the bottom. On red pine, Wikipedia describes bark that is thick and gray-brown at the base but thin, flaky and bright orange-red in the upper crown, and Scots pine often keeps orange flaky bark on the upper trunk after the base turns gray-brown. Look up the trunk, not only at eye level.
• Age changes the pattern. TreeIdentifier describes eastern white pine as smooth and greenish-gray when young and dark and deeply furrowed when mature. Compare a trunk with others of the same size before you decide.

Bark narrows a pine down to a short list; the needle bundle, described below, confirms it.

Needle counts and lengths are given with each so you can confirm the bark reading.

• Eastern white pine (Pinus strobus) - smooth and greenish-gray when young, dark and deeply furrowed when mature (TreeIdentifier); Wikipedia calls the mature bark hard and dark brown. Needles in fives, flexible, bluish-green, 5 to 13 cm. See our eastern white pine wood page.
• Red pine (Pinus resinosa) - thick and gray-brown at the base, thin, flaky and bright orange-red high in the crown (Wikipedia); TreeIdentifier describes broad, flat, reddish-brown plates. Needles in twos, 12 to 18 cm, brittle.
• Scots pine (Pinus sylvestris) - thick, flaky and orange-red when young, scaly and gray-brown in maturity, often still orange on the upper trunk (Wikipedia). Needles in twos, blue-green, 2.5 to 5 cm.
• Ponderosa pine (Pinus ponderosa) - blackish-brown on young trees; on mature trees yellow to orange-red bark in broad plates separated by black crevices (Wikipedia). TreeIdentifier compares the plates to jigsaw-puzzle pieces. Needles in bundles of two or three, 9 to 24 cm depending on subspecies. See ponderosa pine wood.
• Loblolly pine (Pinus taeda) - dark and furrowed when young, thick reddish-brown plates when mature; needles in threes, 6 to 9 in (TreeIdentifier).
• Longleaf pine (Pinus palustris) - thick with broad orange-brown plates; needles 8 to 18 in, the longest of the eastern pines (TreeIdentifier). Loblolly and longleaf are both sold as southern yellow pine.
• Jack pine (Pinus banksiana) - thin, rough, grayish-brown bark; needles in twos, only 1 to 1.5 in (TreeIdentifier).
• Lodgepole pine (Pinus contorta) - thin, scaly, grayish-brown bark; needles in twos, 1 to 3 in, yellow-green and slightly twisted (TreeIdentifier).
• Pitch pine (Pinus rigida) - needles in threes, 3 to 5 in, stiff and twisted; TreeIdentifier notes that it sprouts new branches straight from the trunk.

These two often grow in the same northern forests, and the Nature Groupie article on this exact question gives the bark differences:

• White pine - gray to reddish-brown; young trees smooth and gray to greenish-gray. The bark breaks into many layers of scales arranged in irregular blocks with prominent ridges between them.
• Red pine - reddish-brown and grayish-brown, sometimes pinkish when young. It also forms irregular blocks, but the gaps between them are shallower and read as fissures rather than ridges, and the blocks grow thicker and flakier with age.

The needles settle it in seconds: white pine has five soft needles per bundle, red pine two long brittle ones. Nature Hills offers a memory aid: the word white has five letters. Wikipedia adds a caution about the familiar snap test: red pine needles snap cleanly when bent, but several other pines do the same, so treat it as a hint, not proof. Nature Groupie also notes that red pine was widely planted by forestry operations in the mid-20th century after a fungal disease hit white pine, which is why neat rows of red pine are so common.

Check the needles before the bark. Nature Hills and TreeIdentifier give the same rule: pine needles grow in bundles, called fascicles, of 2, 3 or 5, held together at the base by a papery sheath. Wikipedia notes the count can range from one to seven in a few species but is generally two to five.

• Spruce needles are short, stiff and attached singly to small pegs on the twig (TreeIdentifier).
• Fir needles are flat, soft and attached singly to the branch with a smooth base (TreeIdentifier).
• Pine cones hang downward from the branches, and new spring growth stands up as pale green to yellow candles (Nature Hills).

If the needles come off one at a time, you are not looking at a pine, whatever the bark suggests.

Pines share the family Pinaceae with spruces (Picea), firs (Abies), larches (Larix) and Douglas-firs (Pseudotsuga), according to Wikipedia, so the silhouettes can be close.

• Douglas-fir - the closest match in bark. Wikipedia says it is not a true fir, spruce or pine. Young trees have thin, smooth, gray bark with resin blisters; trees older than about 80 years develop very thick, corky bark, up to 36 cm (14 in), with deep vertical fissures. Its needles attach singly and encircle the twig, and its cones carry three-pointed bracts often compared to the back half of a mouse. See Douglas-fir wood.
• Spruce - single stiff needles on pegs.
• Fir - single flat needles with a smooth base.

A cone and a twig tell these apart faster than bark does.

For an app or an expert, take three pictures: the bark at chest height, the bark as high up the trunk as you can see clearly (the orange upper bark of red and Scots pine only shows there), and one needle bundle held against your palm so the count and length are visible. Add a cone if one is on the ground.

WoodLens identifies pines and their look-alikes from bark, needles or a cut board. Once you know the species, our wood pages cover the lumber: eastern white pine, ponderosa pine, southern yellow pine and Douglas-fir. For bark in general, see identify tree by bark.

This page was drafted with AI help, and every fact was checked against the sources listed on the page.