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Ceratophyllum demersum
demersum
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Photo: Helen Pickering
Off Bovu Island, Zambezi River
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| Synonyms: |
Ceratophyllum oxyacanthum Cham. Ceratophyllum tuberculatum Cham. |
| Common names: | Coontail (English) Rigid hornwort (English) |
| Frequency: | |
| Status: | Native |
| Description: |
Submerged aquatic herb. Stems up to 3m long and 2 mm in diameter, longitudinally grooved. Leaves in whorls of 7-11, 8-40 mm long, filiform, forked 1-2(3) times; margin with spine-tipped teeth, particularly in the apical segments. Flowers axillary, unisexual on the same plant; male flowers in many 1-3-flowered clusters per branch; female flowers solitary, few per branch. Fruit ovoid, ellipsoid to obovoid with an apical spine and 2 prominent basal spines, and raised dark spots on the surface. |
| Notes: | |
| Derivation of specific name: | |
| Habitat: | Occurring an most types of permanent fresh water, even in brackish estuaries, often forming thick mats just below the surface. |
| Altitude range: (metres) | Up to 1600 m |
| Flowering time: | |
| Worldwide distribution: | Subcosmopolitan in temperate and tropical regions. |
| Zimbabwe distribution: | N,W,C |
| Growth form: | |
| Endemic status: | |
| Red data list status: | |
| Insects (whose larvae eat this species): | |
| Spot characters: | Display spot characters for this species |
| Content last updated: | Saturday 23 January 2010 |
| Literature: |
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comments powered by DisqusOther sources of information about Ceratophyllum demersum:
Flora of Mozambique: Ceratophyllum demersumAfrican Plant Database: Ceratophyllum demersum
Biodiversity Explorer (Biodiversity of southern Africa): Ceratophyllum demersum
EOL (Encyclopedia of Life): Ceratophyllum demersum
ePIC (electronic Plant Information Center): Ceratophyllum demersum
Flora Zambesiaca web site: Ceratophyllum demersum
Google: Web - Images - Scholar
GRIN (Germplasm Resources Information Network) taxonomy for plants report for Ceratophyllum demersum
IPNI (International Plant Names Index): Ceratophyllum demersum
JSTOR Plant Science: Ceratophyllum demersum
Kew Herbarium catalogue: Ceratophyllum demersum
Tropicos: Ceratophyllum demersum
West African Plants database: Ceratophyllum demersum
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