Invasives
Amur Cork Tree (Phellodendron amurense)
Amur cork tree is a small to medium-sized tree growing 35 to 50 feet in height. It has prominently ridged bark, which is soft and corky to the touch. Just beneath the ridged outer bark, the tree has a bright yellow inner bark. Amur cork tree has compound leaves with…
Japanese Barberry (Berberis thunbergii)
Japanese barberry is a dense, deciduous, spiny shrub that grows 2 to 8 ft. high. The branches are brown, deeply grooved, somewhat zigzag in form and bear a single very sharp spine at each node. The leaves are small (½ to 1 ½ inches long), oval to spatula-shaped, green, bluish-green,…
Japanese black pine (Pinus thunbergii)
Japanese black pine is a tree native to Japan and China. In the US, it was used ornamentally and can crowd out native species when it escapes garden environments. The trunks of Japanese black pine are often uniquely twisted, making them a popular choice for landscaping and arboretums. They can…
Multiflora Rose (Rosa multiflora)
Multiflora rose is a thorny, perennial shrub with arching stems (canes), and leaves divided into five to eleven sharply toothed leaflets. The base of each leaf stalk bears a pair of fringed bracts. Beginning in May or June clusters of showy, fragrant, white to pink flowers appear, each about an…
Oriental Bittersweet (Celastrus orbiculatus)
Oriental bittersweet is a deciduous woody perennial plant which grows as a climbing vine and a trailing shrub. Mature plants can attain stem widths of 4 inches in diameter and grow as high as 60 feet into trees. The leaves are alternate, glossy, nearly as wide as they are long…
Porcelain berry (Ampelopsis brevipedunculata)
Porcelain berry is a deciduous, woody vine that can closely resemble native grape species. It is also known as amur peppervine and is native to Japan and northern China. It was imported as an ornamental plant in the late 19th century. The vines can climb to 20 feet or more…
Purple Loosestrife (Lythrum salicaria)
Purple loosestrife is an erect perennial herb in the loosestrife family, with a square, woody stem and opposite or whorled leaves. Leaves are lance-shaped, stalkless, and heart-shaped or rounded at the base. Plants are usually covered by a downy pubescence. Loosestrife plants grow from four to ten feet high, depending…
Wineberry (Rubus phoenicolasius Maxim.)
Wineberry is a deciduous shrub that grows up to 6 feet tall. The arching stems (canes), petioles, flowering stems, and buds have a dense covering of reddish, gland-tipped hairs and a few slender prickles. Leaves are alternate. Each leaf is made up of three leaflets; the terminal leaflet is much…