Definition: Submerged Aquatic Weedsgrow below the water's surface, whether attached to substrate or not.
There are also 3 other types of Aquatic Weeds:
NSW, QLD, NT, WA,
Forms slender trailing stems that root at the base. The leaves are long and strap-like, with narrow translucent sheaths at the base. The blades are also long and narrow with parallel margins, or gradually widening above, erect, but with the top end floating on the surface of the water (between 15 to 100 cm long or longer, 1 to 2.6 cm broad). The tips are rounded and minutely serrate, green and membranous, often covered with brown slime and silt.
Species: Potamogetonaceae Family: Ruppia Megacarpa
NSW, SA, WA, VIC
Found in brackish waters. Found in hypersaline lakes, estuaries and lagoons and coastal areas of cooler climate. Usually stems are 20-30cm long with leaves up to 25cm long.
Sagittaria has oval/linear shaped leaf blades with pointed tips, up to 25 cm long and 10 cm wide at the top of each stem (leaf stalk). It also has long narrow strap-like submerged leaves up to 50 cm long. Sagittaria stems are triangular in cross-section. Sagittaria flowers appear in whorls or coils. Male flowers are 3 cm across with three white petals and yellow centres. Female flowers have no petals, resembling flattened green berries. Flowers appear below the height of the leaves during spring and autumn.
NSW, QLD, VIC, SA, ACT, WA, TAS
Submerged annual or perennial with cylindrical stems up to 4 metres long, with stalk less translucent narrow flat linear leaves up to 10 cm long with rounded tips.
NSW, QLD, VIC, SA, NT, ACT, WA
It produces leaves and forms a shoot about 80 mm long. This breaks off and floats to the surface where it grows floating freely in the water.
Species: Alisma Plantagoaquatica Family: Alismataceae
It is a hairless plant that grows in shallow water, consists of a fibrous root , several basal long stemmed leaves 15-30 cm long, and a triangular stem up to 1 m tall. It has branched inflorescence bearing numerous small flowers , 1 cm across, with three round or slightly jagged, white or pale purple, petals