Invasive Species: Najas minor, Brittleleaf Naiad
Brittleleaf naiad is an invasive annual forb that is native to Europe. The highly branched stems can grow up to 4 ft. (1.2 m) in length and fragment easily; hence the common name. …
Myriophyllum heterophyllum, Variable Watermilfoil
Invasive Species: Myriophyllum heterophyllum, Variable Watermilfoil
Variable watermilfoil is an invasive perennial aquatic herb that has leaves of two noticeably different forms. The submerged leaves are finely dissected, whorled, reddish/greenish-brown, and 1/2 to 2 1/2 in. (1.3 to 6.4 …
Securigera varia, Crownvetch
Invasive Species: Securigera varia, Crownvetch
Crownvetch is a low-growing, invasive, herbaceous vine that usually forms thickets up to 3 ft. (0.9 m) in height. The leaves are pinnately compound with 9 to 25 pairs of leaflets and a terminal …
Centaurea calcitrapa, Purple Starthistle
Invasive Species: Centaurea calcitrapa, Purple Starthistle
Purple starthistle is a biennial to perennial invasive plant. It grows 2 to 3 ft. (0.6 to 0.9 m) tall. The stems and leaves are covered with fine hairs. Lower and basal leaves …
Carduus tenuiflorus, Slenderflower Thistle
Invasive Species: Carduus tenuiflorus, Slenderflower Thistle
Slenderflower thistle is an herbaceous winter annual or biennial plant that invades disturbed areas. The most serious infestations occur in the Pacific coastal states, but slenderflower thistle also occurs sporadically in the eastern …
Schefflera actinophylla, Octopus Tree
Invasive Species: Schefflera actinophylla, Octopus Tree
Octopus tree is invasive and can grow to 40 ft. (12.2 m) tall. Stems can be single or multi-stemmed. Leaves are palm-like with 7 to 16 leaflets. Leaflets are ovate, entire, and 12 …
Populus alba, White Poplar
Invasive Species: Populus alba, White Poplar
White poplar is an invasive tree that can grow 40 to 80 ft. (12.2 to 24.4 m) tall and 40 to 50 ft. (12.2 to 15.2 m) wide. The bark on young trees …
Phellodendron amurense, Amur Corktree
Invasive Species: Phellodendron amurense, Amur Corktree
Amur corktree is an invasive perennial tree that can grow from 35 to 45 ft. (10 to 14 m) tall. The tree has a short trunk with spreading branches. The bark is thick …
Morus alba, White Mulberry
Invasive Species: Morus alba, White Mulberry
White mulberry is a small, 30 to 50 ft. (9.1 to 15.2 m) tall, deciduous tree that invades disturbed areas throughout the United States. The alternate leaves are polymorphic (variably shaped), 2 to …
Cupaniopsis anacardioides, Carrotwood
Invasive Species: Cupaniopsis anacardioides, Carrotwood
Carrotwood is an invasive evergreen tree that can grow to a height of 35 ft. (10.7 m). The inner bark is orange; hence the common name. The leaves are compound with 4 to 10 …