| ID Characteristic | Tsuga ulleungensis is an evergreen conifer characterised by its distinct wavy margins to its’ cone scale bracts. It can also be identified by their reddish-brown cones and the white bands on either side of the mid rib. |
| Shape | The plants shape is broad, upright and irregular. |
| Landscape | Hemlocks are typically used for lumber, however, the Tsuga ulleungesis trees are used as wildlife habitat due to scarcity. Due to their rare nature, these trees have been used as specimen plants as well. |
| Propagation | Due to low seed production, natural methods of seed production are not used. Vitro propagation and cryopreservation through somatic embryogenesis has been implemented by researchers. |
| Cultivation | Tsuga ulleungensis is grown naturally on very acidic volcanic soils in the wild. Most Hemlocks in the genus prefer acidic soil, with a pH of 7.0 or lower and well draining soils. From their location on the south facing side of the mountains of Ulleungdo, one can infer that they can tolerate and do well in harsher light. |
| Pests | Hemlock woolly adelgid often infects the Tsuga ulleungensis however the insects are managed using natural pests. Not a major concern if predatory insects are in healthy numbers. |
| Notable Specimens | One notable specimen is at the Morris Arboretum in Philadelphia, United States of America. Another well known specimen is the 30 m tall mature tree that resides in the protected reseve of Namseo, Taeha Reyeong in Ulleungdo, South Korea. |
| Habitat | Tsuga ulleundgensis is found in acidic, well draining moist areas. Also found on North facing slopes on rocky ridges on elevations of approximately 300- 500 m above sea level. Located in forests usually dominated by the Japanese White Pine. |
| Bark/Stem Description | The bark/stem is smooth and measures in 1-1.5mm in diameter. |
| Flower/Leaf Bud Description | The flower/leaf bus is globular or obovoid shape. |
| Leaf Description | The measurements are 10-15mm long linear leaves, with 1.0mm-1.5mm petioles, approximately 1-1.5mm thick in diameter, attenuate bases with slightly thickened margins. Needles have two broad white bands on each side of the midrib. Bands typically include 8 stomata gradually decreasing to 2-3 proximally and 4-5 distally. Includes one resin canal measuring approximately 0.5mm in diameter at the midpoint of the leaf. |
| Fruit Description | Pollen cones are a burgundy colour measuring 0.5-1.0 mm and the juvenile seeds are purple. Bracts are wider than long with crenulate margins. Mature seeds are globular to ovoid in shape. Each cone contains 20-26 seeds. |
| Colour Description | The plant remains a stunning dark green colour throughout the year. |