Najas minor, Brittleleaf Naiad


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 …

Solanum tampicense, Wetland Nightshade


Invasive Species: Solanum tampicense, Wetland Nightshade

Wetland nightshade is a sprawling, semi-woody shrub that invades wetlands in Florida. The green stems are up to 15 ft. (4.6 m) long and prickly. Leaves are alternate, to 10 in. (25 cm) …

Myriophyllum aquaticum, Parrotfeather Watermilfoil


Invasive Species: Myriophyllum aquaticum, Parrotfeather Watermilfoil

Parrotfeather watermilfoil is an herbaceous, rooted, submerged/emergent plant that invades aquatic habitats throughout much of the United States. Stems are stout and blue-green in color. Leaves are abundant, whorled, pinnately compound, and finely …

Arthraxon hispidus, Small Carpgrass


Invasive Species: Arthraxon hispidus, Small Carpgrass

Small carpgrass is an invasive annual grass that was introduced into the United States, either accidentally or by immigrants, from Japan and eastern Asia. The plant stands to 1.5 ft. (0.5 m) tall …

Murdannia keisak, Marsh Dewflower


Invasive Species: Murdannia keisak, Marsh Dewflower

Marsh dewflower (wart-removing-herb) is an annual, emergent plant that invades wetlands in the southeastern and northwestern United States. Plant stems are succulent, form roots at the nodes, and grow prostrate along the ground. …

Paspalum quadrifarium, Tussock Paspalum


Invasive Species: Paspalum quadrifarium, Tussock Paspalum

Tussock paspalum is an invasive perennial plant that grows in large, bluish-green bunches, or tufts, reaching 6 ft. (1.8 m) in height. Leaves are 5.9-15.7 in. (15-40 cm) long, 0.2-0.3 in. (5-8 mm) …

Cyperus entrerianus, Deeprooted Sedge


Invasive Species: Cyperus entrerianus, Deeprooted Sedge

Deeprooted sedge is a wetland sedge that invades disturbed areas throughout the southeastern United States. It is a robust, up to 40 in. (102 cm) tall, grass-like plant with deeply set, thick rhizomes …

Hydrilla verticillata, hydrilla


Invasive Species: Hydrilla verticillata, Hydrilla

Hydrilla is a submersed, rooted invasive aquatic plant that can grow in water to depths of 20 ft. (6.1 m). Plants can survive in depths to 40 ft. (12 m) in nonturbid water. Leaves …

Colocasia esculenta, Coco Yam


Invasive Species: Colocasia esculenta, Coco Yam

Coco yam is an invasive perennial forb that originates from a large corm and can grow to 4 ft. (1.5 m) in height. Leaves, supported by petioles that are 3 ft. (1 m) …