Key Identification Features
- All leaves have noticeably serrated margins, a feature that sets this species apart from other pondweeds.
- polygonifolius can usually be distinguished by the presence of fully formed submerged leaves, which are reduced to strap-like phyllodes in P.
- The taxonomic status of reported populations in the Himalayas requires confirmation, and a published record from China was based on misidentification of Potamogeton distinctus.
- Its submerged leaves are long, grass-like, sessile, and translucent, with mucronate tips where the midrib extends beyond the main leaf blade, creating a distinctly pointed appearance.
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