Hydrilla (waterthyme) is a genus of aquatic plant, usually treated as containing just one species, Hydrilla verticillata, though some botanists divide it into several species.

Hydrilla, considered one of the world's most invasive aquatic plants, has been detected for the first time in Michigan. The Department of Environment, Great Lakes and Energy confirmed two …

Hydrilla blocks waterways and limits boat traffic, recreation, flood control and wildlife use. Almost 80 percent of hydrilla's biomass is in the upper 2 feet of the water column producing a dense …

Hydrilla, (Hydrilla verticillata), submerged aquatic plant that is the sole member of the genus Hydrilla in the frog’s-bit family (Hydrocharitaceae). Hydrilla is possibly native to Africa or …

Mar 28, 2018 · Hydrilla is considered a noxious pest because it grows so rapidly, out competing and eliminating native species, and forming surface mats that hinder recreation, navigation, …

4 days ago · Hydrilla is mainly introduced to new waters as fragments on recreational boats, their motors and trailers and in live wells. Stem pieces root in the substrate and develop into new …

Mar 14, 2025 · Hydrilla has widescale impacts in Florida waters and is highly adaptable to a variety of growing conditions. It can grow in almost any freshwater system including springs, …

Hydrilla or "water thyme" (Hydrilla verticillata) is an aquatic plant from Asia that is one of the most difficult aquatic invasive species to control and eradicate in the United States. Infestations can …

Jul 5, 2024 · Hydrilla has long slender stems that can grow underwater to lengths of up to 25 feet. Its identifying characteristics are displayed to the right. Hydrilla is easily confused with a native …

Dec 12, 2024 · Hydrilla is an aggressively growing perennial plant that roots itself to the bottom of lakes and other waterbodies at depths of up to 12 ft (3.7 m). Its long, branching stems reach …