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Ceratophyllum demersum
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naturalizedCeratophyllaceae

Ceratophyllum demersum

coontail

Ceratophyllum demersum, commonly known as hornwort, rigid hornwort, coontail, or coon's tail, is a species of Ceratophyllum. It is a submerged, free-floating aquatic plant, with a cosmopolitan distribution, native to all continents except Antarctica. It is a harmful introduced weed in New Zealand. It is also a popular aquarium plant.

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Gallery · 12 · iNaturalist
Ceratophyllum demersumCC-BYCeratophyllum demersumCC-BYCeratophyllum demersumCC-BY-SACeratophyllum demersumCC-BY-NCCeratophyllum demersumCC-BY-NCCeratophyllum demersumCC-BY-NCCeratophyllum demersumCC-BY-NC-SACeratophyllum demersumCC0Ceratophyllum demersumCC-BY-SACeratophyllum demersumCC-BY-NCCeratophyllum demersumCC-BYCeratophyllum demersumCC-BY-NC
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Where documented · 9 ahupuaʻa
documented occurrences · iNaturalist + GBIF · iNaturalist 6 · GBIF 15 records
Kailua · OʻahuiNat 3 · GBIF 3 ✓
Waiākea · HawaiʻiiNat 2 · GBIF 2 ✓
Wailuku · MauiGBIF 3
Ukumehame · MauiGBIF 2
Moanalua · OʻahuGBIF 2
Ohanaula · HawaiʻiiNat 1
Kalapakī · KauaʻiGBIF 1
Waipiʻo · HawaiʻiGBIF 1
Hanakaʻōʻō · MauiGBIF 1