Stuckenia pectinata (syn. Potamogeton pectinatus), commonly called fennel pondweed or sago pondweed, and sometimes called ribbon weed.
It is a cosmopolitan water plant species that grows in fresh and brackish water on all continents except Antarctica.
Stuckenia pectinata is a fully submerged aquatic plant and does not have any floating or emerged leaves.
The flowers are wind pollinated and the seeds float. Tubers that are rich in starch, are formed on the rhizomes. Reproduction can either be vegetative with tubers and plant fragments or sexual with seeds.
The whole plant provides food for different species of waterbirds.
Stuckenia pectinata has long narrow linear leaves which are less than 2 mm wide; each is composed of 2 slender parallel tubes.
The fruits are 3 to 5 mm long.
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