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…
Autumn Olive (Elaeagnus umbellata)
Autumn olive is a deciduous shrub that can grow to 20 ft. in height. The stems, buds and leaves have a dense covering of silvery to rusty scales. Leaves are alternate, egg or lance-shaped, smooth margined, dull green above and often with brown scales beneath. Autumn olive flowers in June…
Black Swallowwort (Cynanchum louiseae syn: Cynanchum nigrum)
Black or Louis’ swallow-wort (previously Vincetoxicum nigrum and Cynanchum nigrum) is a perennial, twining herbaceous vine. The leaves are oval shaped with pointed tips, 3-4 in. long by 2-3 in. wide, and occur in pairs along the stem. The small five-petaled star shaped flowers are dark purple to almost black with white hairs, about…
Brazilian Waterweed (Egeria densa)
Brazilian waterweed, also known as Brazilian elodea, is a submerged aquatic perennial plant that infests streams, lakes, and ponds. The bright green stems are generally 1-2 feet in length, but can be as much as 20 feet. The plant’s leaves are arranged in whorls of 4 to 6 leaves; the…
Broad-leaved Pepperweed (Lepidium latifolium L.)
Broad-leaved pepperweed, also called tall pepperweed, perennial peppergrass, tall whitetop, giant whiteweed, and ironweed is an herbaceous perennial that can grow up to 5 feet tall. Plants have many stiff, upright stems that grow from a woody crown of roots. Old stems persist through the winter with rosettes of leaves…
Burning Bush (Euonymus alatus)
Burning bush, or winged spindletree, grows as a deciduous shrub up to 12 feet tall. Corky ridges form along the green twigs, and give the branches a winged appearance. The leaves are opposite and are elliptical in shape with toothed margins, and turn a brilliant scarlet in the fall. Inconspicuous…
Bush Honeysuckle (Lonucera maackii, Lonicera morrowii, Lonicera tatarica, Lonicera x bella)
Exotic bush honeysuckles are upright, generally deciduous shrubs that range from 6 to 15 feet in height. The 1-2 ½ inch, egg-shaped leaves are opposite along the stem and short-stalked. Older stems are often hollow. Pairs of fragrant, tubular flowers less than an inch long are borne along the stem…
Callery Pear (Pyrus calleryana Dcne.)
Callery pear is an upright, pyramidal tree that grows 20–30 ft. tall, with a 20–30 ft. wide canopy. Young trees are relatively slender and may be thorny. Its alternate leaves are oval, up to 3 inches long and 1 1/2 to 3 inches wide, with small, round-toothed margins; long petioles…
Common Reed (Phragmites australis)
Common reed, or Phragmites, is a tall, perennial grass that can grow to over 15 feet in height. In North America, both native Phragmites (Phragmites australis ssp. americanus Saltonstall, P.M. Peterson & Soreng) and introduced subspecies are found. Introduced Phragmites forms dense stands which include both live stems and standing…
Creeping Buttercup (Ranunculus repens L.)
Creeping buttercup is an herbaceous perennial that grows along the ground. Plants have thick stems and may be as much as 1 foot tall. Leaves and stems are usually hairy. Leaves at the base of the plant have long petioles; leaves that are higher on the stem have shorter petioles…