Evergreen monoecious tree, a species of the genus Fir of the Pine family (Pinaceae). Unicolor fir is a powerful (trunk diameter up to 1.9 meters), tall (up to 60 meters) tree with a wide conical crown, dense in youth and relatively rare and lowered in old age; a sharp spire-shaped top (in old trees it becomes flatter).

The bark is gray, smooth, hard; the thickness at the base of the tree in adult trees is 10-15 cm, can reach 18 cm, with deep longitudinal furrows, resistant to fire. Skeletal branches are located at right angles to the trunk, tend to sag with age. Branching branches are small, smooth, with yellowish pubescence, usually directed upwards. The buds are yellow-green, blunt and resinous, about 6 cm long.

The needles are flat, green or bluish-green, with grayish-white lines on both sides, often crescent-curved, rounded or blunt-pointed at the tip, with a slightly expanded base, asymmetrically arranged. They have a pungent smell, reminiscent of camphor.

Cones are large, sessile, oval-cylindrical, 7-12 cm long, 3-4.5 cm wide; at the beginning of maturation, olive-green, then turn yellow-brown and dark brown.

Due to its winter hardiness, relative unpretentiousness and resistance to urban conditions, the tree can not only be successfully introduced in a large part of the territory of Russia, but also widely used for landscaping and landscape construction.