Invasives
Spotted Knapweed (Centaurea stoebe)
Spotted knapweed, previously known as Centaurea biebersteinii, is a biennial or short-lived perennial. Its name is derived from the spots formed by black margins on the flower bract tips. Spotted knapweed typically forms a basal rosette of leaves in its first year and flowers in subsequent years. Rosette leaves are…
Tree-of-Heaven (Ailanthus altissima)
Tree-of-heaven, also known as ailanthus, Chinese sumac, and stinking shumac, is a deciduous tree in the mostly tropical quassia family. Mature trees can reach 80 feet in height. Tree-of-heaven has smooth stems with pale gray bark and twigs which are light chestnut brown, especially in the dormant season. Its large…
Wall Lettuce (Mycelis muralis (L.) Dumort.)
Overview: Slender annual or biennial herbaceous plant with smooth erect stems. Size: 2-3ft tall Leaves: At the base of the stems, alternate leaves have deep, pointed lobes and a large triangular lobe at the end. Basal leaves are 2 ½ –7 inches long and 1–3 inches wide rosette; the few…
Water Chestnut (Trapa natans)
Overview: Annual rooted, aquatic plant with both floating and submersed leaves. Size: Stems can be 12-15 feet long Leaves: Floating leaves form a rosette and are green, glossy and triangular with toothed edges. The submersed leaves are feathery and whorled around the stem. Stem/Bark: Hollow, air-filled, and cord-like. Flowers: Tiny,…
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…
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…