is a perennial inhabiting pond, waterways, etc., stems measuring
0.3-2 mm in diameter, with an overall length of 1m or more.
Leaves,1.5-4.5cm, branch at the bases into two, continuing branching
afresh likewise two or three times. There are many insectivorous
sacs among stems or leaflets, or segments. Flowers, each 1.5-3cm in
diameter, come singly on each branch tip - total flower number on
all of the branched stem tops count 3-10. Bloom time: