The American pine wood that has no resin is the Western White Pine (Pinus monticola). This species is known for its lack of resin, which makes it highly valued in the construction industry for its durability and resistance to decay. The absence of resin in Western White Pine wood is due to its unique cellular structure and genetic makeup.

The Western White Pine is native to the Pacific Northwest region of the United States, stretching from southeastern Alaska to northern California. It is one of the largest pine species in North America, with some trees reaching heights of over 250 feet and diameters of over 10 feet. The wood of the Western White Pine is light in color, ranging from a pale yellow to a creamy white, and has a straight grain, which contributes to its aesthetic appeal and workability.

The resin-free nature of Western White Pine wood is a result of its cellular structure. Unlike many other pine species, the Western White Pine has fewer resin canals in its wood, which are the channels through which resin is transported. This reduced presence of resin canals makes the wood less susceptible to decay and insect infestation, which are common issues with resinous woods. According to a study published in the Journal of Wood Science, the Western White Pine has fewer than 1,000 resin canals per square millimeter, compared to over 10,000 in some other pine species.

The lack of resin also makes Western White Pine wood more dimensionally stable, meaning it is less prone to warping and cracking over time. This stability is crucial for construction projects where the wood will be exposed to varying temperatures and humidity levels. The American Wood Council reports that Western White Pine is often used in construction applications such as framing, siding, and interior trim due to its exceptional strength and stability.

In addition to its practical benefits, Western White Pine wood is also prized for its aesthetic qualities. The wood's light color and straight grain provide a clean, modern look that complements a wide range of architectural styles. This has made it a popular choice for furniture making and cabinetry, where its lack of resin also ensures that the finished products are free from the yellowing and cracking that can occur with resinous woods.

In conclusion, the Western White Pine is the American pine wood that has no resin, making it an ideal choice for construction and woodworking projects. Its unique cellular structure and genetic makeup result in a wood that is durable, stable, and aesthetically pleasing, all of which contribute to its widespread use in the industry.