The Corkscrew Willow, scientifically known as Salix matsudana 'Tortuosa', is a unique variety of willow tree valued for its contorted, twisted branches and ornamental appearance. Here are some key features of the Corkscrew Willow:

1. Appearance: The Corkscrew Willow is a deciduous tree with a distinctive growth habit characterized by its contorted, twisted branches and stems. These branches create an interesting and ornamental silhouette, especially in winter when the tree is leafless. The leaves are narrow and green, turning yellow in the fall before dropping.

2. Size: Corkscrew Willows typically grow to a height of about 20 to 40 feet, with a spread of about 15 to 25 feet. However, their size can vary depending on growing conditions and pruning.

3. Bark: The bark of Corkscrew Willows is gray-brown and relatively smooth, with shallow fissures developing as the tree matures.

4. Flowers: In early spring, before the leaves emerge, Corkscrew Willows produce small, inconspicuous flowers on their branches. These flowers are followed by small, fuzzy catkins that add further interest to the tree's appearance.

5. Sunlight: Corkscrew Willows prefer full sun but can tolerate partial shade.

6. Soil: They grow best in moist to wet soil, making them suitable for planting near water features, ponds, or in low-lying areas of the landscape. However, they can also tolerate a range of soil types, including clay and loam.

7. Landscape Use: Corkscrew Willows are often used as specimen trees in landscape designs, where their unique form can be showcased. They can also be planted in groups or used to create informal screens or windbreaks. Due to their tolerance of wet soils, they are suitable for planting in rain gardens or along stream banks.

8. Maintenance: Corkscrew Willows are relatively low-maintenance trees. They benefit from regular watering, especially during periods of drought, and may require supplemental irrigation in dry conditions. Pruning is typically not necessary, but occasional maintenance pruning can be done to remove dead or damaged branches and to shape the tree if desired.

Overall, the Corkscrew Willow is prized for its unique and ornamental appearance, making it a popular choice for adding visual interest to landscapes and gardens. However, its rapid growth and spreading root system should be considered when selecting a planting location.