Clematis orientalis L.

Clematis orientalis is a deciduous vine or scrambling shrub in the buttercup family Ranunculaceae, that originates from Asia and Eastern Europe. It was brought to the United States as an ornamental plant but escaped cultivation leading to its classification as a noxious weed in some states. Common names for C. orientalis include Chinese clematis, Oriental virginsbower, orange peel, and orange peel clematis.

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Clematis orientalis is a deciduous scrambling shrub that grows to attach to its environment by means of tendril-like stems. It grows densely at a rate of least a meter per year. Stem The stems are slender and tendril-like. It grows to heights of about 2–8 meters, with a thickness up to 7 cm. The stems are covered with gray-brown bark, with the inner bark being green. The vines twine to rocks, other plants, and other things in its environment as it climbs. Flower C. orientalis flowers can be solitary or grow in clusters in a cyme inflorescence. Most noticeable about the flower is the four yellow to yellow-orange sepals, which are often mistaken for its petals. The sepals are ovate-lanceolate to elliptic, wide-spreading and tend to curl back at its maturity. The sepals reaches widths of 2–3 cm and lengths of 6–9 cm. No hair abaxial of sepal. The flower is hermaphroditic. The style is 3–10 cm long and remains attached to the achene, acting as its wings. The flower has a strong fragrance. Leaf The leaves are pinnately compound, with 3 to 7 leaflets per leaf. The leaflets are coarsely-toothed to entire or ovate to linear-lanceolate and 1–5 cm long. The leaves have a gray-green color. The leaves have an opposite arrangement on the stem. Root C. orientalis roots are weak and flexible with branching finer roots of tan to orange-tan coloring.

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