Invasives

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…

European Alder (Alnus glutinosa (L.) Gaertn.)

European alder, also known as common alder or black alder is a tree that grows 40-50 ft in height. Its branches are alternate. Its leaves are simple, oval, 2 to 4 inches long, 2 to 3 inches wide, with a rounded or slightly notched tip, have a doubly serrate margin,…

Wall Lettuce (Mycelis muralis (L.) Dumort.)

Wall lettuce is a slender annual or biennial herbaceous plant. The smooth, erect stems grow from fibrous roots. Stems are 2–3 feet tall and branch near the top; when broken, they exude a milky fluid that can irritate the skin. Leaves at the base of the stems have deep, pointed…

Wild Chervil (Anthriscus sylvestris (L.) Hoffm.)

Wild chervil, also called cow parsley, is an herbaceous biennial that grows 3–4 feet tall. The hollow stems are branched and covered with soft hairs. The compound, alternate leaves are fernlike—each leaf is divided into leaflets that are also divided. Plants have long taproots that grow up to 6 feet…