Hydrocharitaceae is a flowering plant family including 16 known genera with a total of ca 135 known species (Christenhusz & Byng 2016), that including a number of species of aquatic plant, for instance the tape-grasses, the well known Canadian waterweed and frogbit Hydrocharis morsus-ranae. Pontederiaceae is a family of flowering plants.It is best known for the water hyacinth (Pontederia crassipes), which is an invasive species in many waterways. The highly modified Heteranthera gardneri is a submerged aquatic with a two-flowered pseudanthium. Learn more about Water-weed
NatureFootage offers the largest niche collection of HD and Ultra HD 4K+ stock footage focused on Nature & Wildlife, Oceans & Underwater, and People & Adventure, curated from hundreds of leading cinematographers worldwide.