Plantae > Tracheophyta > Magnoliopsida > Ceratophyllales > Ceratophyllaceae > Ceratophyllum > Ceratophyllum demersum

Ceratophyllum demersum (hornwort; coontail; coon's tail; coon's-tail; common hornwort)


Wikipedia Abstract

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.
View Wikipedia Record: Ceratophyllum demersum


Invasive Species

Ceratophyllum demersum is a native of North America. It now has a worldwide distribution, at least in part due to the aquarium and pond trade. It is a submerged aquatic plant which is capable of forming dense monospecific beds, excluding other plant species, causing problems to recreational activities on waterways and in some cases causing blockages at hydroelectric power stations. C. demersum can spread rapidly, and grows in a large range of aquatic habitats.
View ISSG Record: Ceratophyllum demersum


Bloom Period [1]  Summer
Drought Tolerance [1]  None
Edible [2]  May be edible. See the Plants For A Future link below for details.
Flower Type [2]  Monoecious
Frost Free Days [1]  3 months 20 days
Fruit/Seed Abundance [1]  Low
Fruit/Seed Begin [1]  Summer
Fruit/Seed End [1]  Fall
Growth Form [1]  Multiple Stem
Growth Period [1]  Summer
Growth Rate [1]  Rapid
Leaf Type [1]  Deciduous
Lifespan [2]  Perennial
Pollinators [2]  Water
Propagation [1]  Seed, Sprig
Regrowth Rate [1]  Slow
Seed Spread Rate [1]  Rapid
Seed Vigor [1]  High
Seeds Per [1]  165000 / lb (363762 / kg)
Shape/Orientation [1]  Prostrate
Structure [4]  Herb
Vegetative Spread Rate [1]  Rapid
Flower Color [1]  Blue
Foliage Color [1]  Gray-Green
Fruit Color [1]  White
Height [2]  39 inches (1 m)
Hardiness Zone Minimum [1]  USDA Zone: 3 Low Temperature: -40 F° (-40 C°) → -30 F° (-34.4 C°)
Light Preference [3]  Mostly Sunny
Soil Acidity [3]  Neutral
Soil Fertility [3]  Rich
Soil Moisture [3]  Submerged
Water Use [1]  High
Screening - Summer [1]  Porous
Screening - Winter [1]  Porous
View Plants For A Future Record : Ceratophyllum demersum


Name Countries Ecozone Biome Species Report Climate Land
Central & Western Europe Austria, Belgium, Byelarus, Czech Republic, Denmark, France, Germany, Liechtenstein, Lithuania, Luxembourg, Netherlands, Poland, Russia, Slovakia, Switzerland, Ukraine, United Kingdom Palearctic Temperate Floodplain River and Wetlands    
Upper Danube Austria, Croatia, Czech Republic, Germany, Hungary, Italy, Poland, Slovakia, Slovenia, Switzerland Palearctic Temperate Floodplain River and Wetlands    

Protected Areas



Caribbean; North America; Oceania;

External References

USDA Plant Profile



Attributes / relations provided by
1USDA Plants Database, U. S. Department of Agriculture
2Plants For A Future licensed under a Creative Commons License
3ECOFACT 2a Technical Annex - Ellenberg’s indicator values for British Plants, M O Hill, J O Mountford, D B Roy & R G H Bunce (1999)
4Kattge, J. et al. (2011b) TRY - a global database of plant traits Global Change Biology 17:2905-2935
5Jorrit H. Poelen, James D. Simons and Chris J. Mungall. (2014). Global Biotic Interactions: An open infrastructure to share and analyze species-interaction datasets. Ecological Informatics.
6Oriental Stork, BirdLife International (2001) Threatened birds of Asia: the BirdLife International Red Data Book. Cambridge, UK: BirdLife International.
7HOSTS - a Database of the World's Lepidopteran Hostplants Gaden S. Robinson, Phillip R. Ackery, Ian J. Kitching, George W. Beccaloni AND Luis M. Hernández
8del Hoyo, J., Elliott, A., Sargatal, J., Christie, D.A. & de Juana, E. (eds.). Handbook of the Birds of the World Alive. Lynx Edicions, Barcelona.
9Biological Records Centre Database of Insects and their Food Plants
10Dietary Overlap in Three Sympatric Congeneric Freshwater Turtles (Pseudemys) in Florida, Karen A. Bjorndal, Alan B. Bolten, Cynthia J. Lagueux and Dale R. Jackson, Chelonian Conservation Biology, 1997, 2(3):430-433
11Food Habits and Selective Foraging by the Texas River Cooter (Pseudemys texana) in Spring Lake, Hays County, Texas, JACQUELINE R. FIELDS, THOMAS R. SIMPSON, RICHARD W. MANNING, AND FRANCIS L. ROSE, Journal of Herpetology, Vol. 37, No. 4, pp. 726–729, 2003
Ecoregions provided by World Wide Fund For Nature (WWF). WildFinder: Online database of species distributions, ver. 01.06 WWF WildFINDER
Protected Areas provided by Biological Inventories of the World's Protected Areas in cooperation between the Information Center for the Environment at the University of California, Davis and numerous collaborators.
Natura 2000, UK data: © Crown copyright and database right [2010] All rights reserved. Ordnance Survey Licence number 100017955
Chippewa Nature Center
Edwin S. George Reserve, University of Michigan, Department of Ecology and Evolutionary Biology
Abstract provided by DBpedia licensed under a Creative Commons License