R.L. Colston 3/4 in. Select Heart Pine Unfinished Solid Hardwood Flooring 5.25 in. Wide, $4.99 USD/Box, LL Flooring (Lumber Liquidators)

This unfinished pine flooring features tongue and grooves on the long sides to maximize board usage. Boards can also be face-nailed if desired, and may have pine knots up to 2" thick. Please note that unfinished pine will have open holes and may vary in bundle size. Species: Heart Pine with a natural wood grain texture. Installation options include nail, glue, or nail with glue assist. Suitable for above grade or on grade installation. Heart Pine is a flooring option with great natural character, making it perfect for country-style or traditional home decor. The rustic knot patterns and goldish-amber tones will add warmth to any room.