"Acer palmatum polymorphum" cv. "Viridis" (Frank Tall) is a cultivar of Japanese maple known for its striking foliage and upright growth habit. Here's a description in English:

Description:

1. Foliage: The leaves of Acer palmatum polymorphum cv. "Viridis" are deeply lobed and palmate, with five to nine pointed lobes. They are typically green in color, hence the cultivar name "Viridis," which means green. The foliage emerges in spring with a fresh green coloration and may develop bronze or red hues in the fall, depending on environmental conditions.

2. Form: This cultivar typically grows in an upright, vase-shaped form, reaching heights of up to 20 feet (6 meters) with a spread of 15 feet (4.5 meters) or more. The growth habit is generally compact and symmetrical, making it an ideal choice for small gardens or landscapes.

3. Bark: The bark of Acer palmatum polymorphum cv. "Viridis" is smooth and grayish-brown, adding visual interest, especially during the winter months when the foliage has fallen.

4. Flowers and Fruits: In spring, small inconspicuous flowers appear, followed by winged samaras, commonly referred to as "helicopter seeds," in the summer. However, the primary ornamental feature of this cultivar is its foliage rather than its flowers or fruits.

5. Hardiness: This cultivar is typically hardy in USDA Hardiness Zones 5 to 8, although specific hardiness may vary depending on local climate conditions.

Landscape Use:

Acer palmatum polymorphum cv. "Viridis" (Frank Tall) is prized for its ornamental value and is commonly uséd in landscapes and gardens as a focal point, specimen tree, or accent plant. Its compact size and upright growth habit make it suitable for various garden settings, including Japanese-style gardens, mixed borders, and containers.

Maintenance:

To maintain the health and vigor of Acer palmatum polymorphum cv. "Viridis" (Frank Tall), provide it with well-drained soil, regular watering, and partial shade to protect its foliage from scorching in hot summers. Pruning can be done in late winter or early spring to remove any dead or damaged branches and maintain the desired shape. Additionally, applying a layer of mulch around the base of the tree can help conserve soil moisture and regulate soil temperature.