2024 Edition • Get the App • Cite this Page
X

Colors

Data mode

Account

Login
Sign up

Collapse this

Support the Flora of the Southeastern US

2024 has been a banner year for making the best flora we can imagine. We've created:
With financial support from people like you, we are aiming even higher in 2025. Together we can accomplish all this: Vote on our 2025 priorities
  • Add Global Conservation Ranks (GRanks) vote
  • Professional graphic keys (polyclaves) to individual families/genera vote
  • 2 new FloraQuest apps: Florida & Mid-South vote
  • Image overlays highlighting diagnostic characters with arrows vote
  • iNaturalist integration in FloraQuest vote
Write-in vote: vote
We've set a goal of recruiting 200 ongoing supporters to donate $15 or more each month in 2025. Please help us reach this goal and make next year's flora even better:
Donate $15 per month
(0.2¢/heliophily index)
Donate $30 per month
(0.4¢/heliophily index)
Donate $50 per month
(amazing!)
Donate another
or one-time amount
Copy permalink to share

Zannichellia Linnaeus. Horned Pondweed.

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

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).

Ref: Haynes & Hellquist (2000d) In Flora of North America Editorial Committee (2000); Haynes & Holm-Nielsen (1987). Show full citations.

Show in key(s)

Show parent family

Show species in Zannichellia

Your browser does not support SVGs

Hover over a shape, letter, icon, or arrow on the map for definition or see the legend. Data for arrows not developed for genera and families which may have species only occurring outside the flora area.

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

Feedback

See something wrong or missing on about Zannichellia? Let us know here: (Please include your name and email if at all complicated so we can clarify if needed.) We greatly appreciate feedback, and will include updates from you in our next webapp update, which can take a few months.