Key Identification Features
- Alongside its red stems, its most distinctive feature is leaf margins with serrations up to 4 mm long.
- The two can be distinguished by bract and leaf traits: P.
- Two structurally and distributionally distinct subspecies are currently recognized.
- Its most distinctive features are emergent stems and leaves that can grow up to one foot above the water surface, with a growth habit resembling small fir trees.
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