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Potamogetonaceae
Zannichellia

not marked as a favorite taxon Zannichellia Linnaeus. Common name: Horned Pondweed.

A genus of about 5 species, aquatic herbs, nearly cosmopolitan.

Glossary (beta!)

ID notes: Zannichellia is sometimes confused with other aquatics, such as Ruppia and narrow-leaved Potamogeton. Potamogeton has at least some leaves alternate; Zannichellia and Ruppia are opposite-leaved. Zannichellia lacks the abruptly broadened sheath of Najas. Also, the seeds are flattened in Zannichellia, and toothed down one side; Najas has a cylindric or elliptic fruit. Zannichellia has longer leaves (3-10 cm long) than Najas (< 4 cm long).

References: Haynes & Hellquist (2000d) In Flora of North America Editorial Committee (2000); Haynes & Holm-Nielsen (1987); Haynes, Les, & Holm-Nielsen (1998e) In Kubitzki (1998b). Show full citations.

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image #1 of Zannichellia© David Delon, some rights reserved (CC BY), uploaded by David Delon | Zannichellia palustris source CC-BY | Original Image ⭷
image #2 of Zannichellia© Lowell Urbatsch | Zannichellia palustris | Original Image ⭷

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