Pine trees, particularly species like longleaf pine (Pinus palustris) and slash pine (Pinus elliottii), are the primary source for deriving turpentine. This resinous substance has been tapped from coniferous trees for centuries, with modern production centered in regions rich with these species, such as the southeastern United States.

Primary Trees Involved

Turpentine comes from the oleoresin exudate of various pine species, where incisions in the bark release a mixture of volatile oils and resins. Key producers include:

  • Longleaf pine (Pinus palustris): A major U.S. source, valued for its high resin yield.
  • Slash pine (Pinus elliottii): Commonly used in American production due to abundant growth in the South.
  • Maritime pine (Pinus pinaster): Dominant in Europe, especially France and Portugal.
  • Scotch pine (Pinus sylvestris): Another European staple for turpentine oil.

These pines belong to the Pinaceae family, and the process involves collecting "gum turpentine" which is distilled into the familiar solvent.

Historical Context

Originally, turpentine also referred to resins from non-pine trees like the terebinth (Pistacia terebinthus), known as the "turpentine tree" in Mediterranean regions. This produced Chian or Cyprian turpentine, but today, commercial turpentine overwhelmingly means pine-derived oil of turpentine. As noted in a recent NYT crossword clue from March 15, 2026, the 5-letter answer is PINE , tying directly into this puzzle context.

Extraction Process

Workers make V-shaped cuts called "catfaces" on pine trunks, allowing resin to flow into cups. The collected gum is steam-distilled to separate the volatile turpentine oil from solid rosin. This method, refined since the 1920s, remains standard, though sustainable "corking" techniques minimize tree damage.

Modern Uses and Trends

Turpentine oil serves as a paint thinner, varnish solvent, and industrial chemical, with growing interest in bio-based alternatives amid 2026 sustainability pushes. Forums like Reddit's r/crossword buzz about the clue, confirming PINE as the go-to answer, while eco-discussions highlight pine plantations' role in green chemistry. No major 2026 news shifts this—pine remains king.

TL;DR: The tree is the pine, especially longleaf and slash varieties, yielding turpentine via resin tapping and distillation.

Information gathered from public forums or data available on the internet and portrayed here.