0604.20.00.20 - Douglas fir

This HTS classification specifically covers Douglas fir, which are recognized for their suitability as Christmas trees. Within the broader category of fresh evergreen Christmas trees, this subheading is dedicated to this particular species, distinguishing it based on its botanical identity. The classification hinges on the identification of *Pseudotsuga menziesii* as the sole species covered here.

Douglas fir is differentiated from its sibling categories by its distinct botanical characteristics. Category 0604.20.00.40 pertains to "Fir except Douglas fir," encompassing other species of fir trees. Category 0604.20.00.60 serves as a residual category for any other evergreen trees not specifically listed, such as pines, spruces, or hemlocks, that are suitable for use as Christmas trees.

As this is a leaf node within the HTS structure, there are no further subcategories. Therefore, classification under 0604.20.00.20 is definitive once the goods are identified as Douglas fir and meet the preceding criteria of being a fresh evergreen Christmas tree. The primary classification criterion is the accurate identification of the species.