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Multi-flora Rose
Rosa multiflora
Multi-flora rose is extremely prolific, producing large amounts of seeds which are dispersed by birds. These seeds can remain viable for 20 years
Multi-flora Rose
INVASIVE SPECIES
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Norway Maple
Norway Maple
Acer platanoides
Norway maples produce large numbers of seeds which can be widely dispersed due to their winged samaras.
Oriental Bittersweet
Oriental Bittersweet
Celastrus orbiculatus
Oriental, or asiatic, bittersweet is a perennial, deciduous vine that can grow up to 60 ft. Its stems have dark brown, striated bark. The alternate leaves are elliptic to ovate, and spiral evenly around the stem. Axillary flowers bloom in May to early June yielding bright, reddish-orange fruit in the fall. Oriental bittersweet can be confused with american bittersweet, a native species, which has terminal inflorescence and orange capsules
Poison Hemlock
Poison Hemlock
Conium maculatum
Poison hemlock is biennial herbaceous plant that grows as a rosette in the first year and grows a tall flower stalk in the second. Its fern-like leaves are at least 2 feet long and pinnately compound. The stem is hairless, hollow and speckled with purple.
Policemen’s Helmet, Himalayan Balsam
Policemen’s Helmet, Himalayan Balsam
Impatiens glandulifera
Policemen's helmet is an annual herb that produces irregularly shaped, pink to purple colored flowers. Similar to other ‘touch-me-not’ species, this plant produces fruit that bursts at maturity when disturbed.
Porcelain Berry
Porcelain Berry
Ampelopsis glandulosa
Porcelain berry is a perennial, deciduous vine that can grow up to 20 feet long. It produces small greenish-yellow flowers that develop into hard berries in various shades that mature to a bright blue.
Purple Loosestrife
Purple Loosestrife
Lythrum salicaria
Purple loosestrife is an erect, herbaceous perennial that grows 3-7 ft. tall. It is easily identified by its showy, magenta flowers from July to September. Linear-shaped leaves grow oppositely along square stems. This aggressive plant spreads both vegetatively and by abundant seed dispersal.
Reed Canarygrass
Reed Canarygrass
Phalaris arundinacea
Reed canarygrass can reach 5 ft. in height. Its leaves are hairless, reaching up to 10” long and 1⁄4" to 1⁄3" wide. This grass has an extensive root system and spreads primarily through rhizomes, but also produces a high number of seeds.
Scotch Broom
Scotch Broom
Cytisus scoparius
Scotch broom is a shrub with small, pea-like yellow flowers that bloom from late May to June. It grows up to 10 feet tall and its green branches are sharply angled with five ridges.
Slender False Brome
Slender False Brome
Brachypodium sylvaticum
Slender false brome is a perennial grass that grows in dense clumps. This species has long, drooping, bright green leaves 5-12 mm wide, which can be covered in long, sparse hairs or may be hairless.
Spotted Knapweed
Spotted Knapweed
Centaurea stoebe
Spotted knapweed is an herbaceous biennial, although it may live for up to nine years. In its first year it grows in a basal rosette with 6-8” leaves. In every year after that, it can grow up to 3 ft. tall with flowers growing at the ends of its many branching stems.