Hemlock (Tsuga Carr), evergreen tree, resin; The bark is light red; Branches are slender, flat or pendulous, coarse with persistent leaf bases; Leaf linear, flat or angular, 2-row, abaxially with stomatal lines; Globular solitary; Male sphaerules are born in the axillary of the leaf and consist of numerous stamens, each with 2 anthers and septate; Pollen has air sacs or air sacs degenerated; Female bulbs are terminal, erect, round, imbricate, about the same length as bracts, base with 2 ovule; Cones small, long elliptical-ovate, subsessile, pendulous, pale green or lilac, beads develop into seed scales at maturity, woody, brown, bracts small, not visible, rare longer and visible; The seeds have membranous wings; Cotyledon 3-6. There are about 14 species of hemspruce, distributed in North America and eastern Asia, and about 5 species in China, which are produced in provinces and regions south of Qinling Mountains and Yangtze River. They are precious wood species and can be used as forest regeneration in mountainous areas or afforestation in barren mountains. Among them, T. hemspruce (Franch.) E. Pritz. For the most common representative, like born on the stone slope of the valley side, the material is soft and corrosion-resistant, suitable for the plate.

The wood texture is straight and uniform, the material is fine, tough, and the hardness is larger than other brazed trees, so the name "Hemlock". It can be used for construction, furniture, appliances, boats and vehicles, Bridges and wood fiber industrial raw materials. The bark can extract tannin extract. It can be used as a tree for forest renewal or afforestation of barren mountains in high mountain areas