Watersprite

''Ceratopteris thalictroides'' is a fern species belonging to the genus '' Ceratopteris'', one of only two genera of the subfamily Parkerioideae of the family Pteridaceae.

Common names

''Ceratopteris thalictroides'' is commonly known as water sprite, Indian fern, water fern, oriental waterfern, and water hornfern. In the Philippines, it is called ''pakung-sungay'' (literally 'antler fern' or 'horn fern').

Distribution

''Ceratopteris thalictroides'' is widespread across tropical regions.

Description

Rooted in mud, ''Ceratopteris thalictroides'' plants vary in size and appearance. The stipes of mature plants are 3-15 mm in diameter, spongy, and air-filled with long including its stipe.

Pale green, brown when matured, fertile fronds are or more, including the stipe, to long. Proliferous or dormant buds with their overlapping dark scales present in the axils of fertile pinnae are winged. Pinnae are deeply incised with segments 2-15 mm x 10-30 mm and the fertile segments 1-2 mm x 10-80 mm.''Ceratopteris thalictroides''
in Australian National Herbarium

In the north type and the third type, the count of chromosomes is 2n=126 while in the south type its 2n=154, making it separate from species.

Ecology

''Ceratopteris thalictroides'' is often found near stagnant water or in still pockets along slow flowing rivers in swampy areas, swamp forests, sago swamps, marshes, natural and man-made ponds. The plant thrives in full sun to moderate shade, from sea level to in elevation, but mostly less than in elevation. ''Ceratopteris t.'' is often massed on or around logs or other floating vegetation. The plant was once recorded in a fresh-water mangrove (''Sonneratia'') growing among the finger-like pneumatophores. In some areas, ''Ceratopteris'' exhibits a degree of seasonality, reaching maturity and shedding spores during the dry season; plants have lost nearly all sterile fronds by this stage. The species has been reported to functionally be an annual, repopulating from spores the next season, but it is clearly of indefinite lifespan in cultivation.

Uses

Culinary

Fronds are cooked and eaten as a vegetable in Madagascar, New Guinea, and Vietnam, and raw as a salad in Micronesia.. It has been used similarly to watercress. In Malaysia and Japan, uncurled fronds have been used in salads. However, the plant is believed to contain carcinogenic chemicals.

Other

''Ceratopteris t.'' is widely used as an aquarium plant, and is prized for its versatility, being used both as a floating plant and a plant that can be rooted in the substrate.

The plant can be used as manure for rice.

''Ceratopteris t.'' is used medicinally as a poultice for dermatological issues in Malaysia and the Philippines. In China, it's applied to wounds to stop bleeding.

In the Sepik region of New Guinea, fronds are used as a personal decoration.

Cultivation

It grows best in soil with a pH reading of 5-9 and in very high amounts of light. It usually grows quickly.

''Ceratopteris t.'' can benefit (like all aquatic plants) from the addition of CO₂. The plant's reproductive technique is similar to other ferns. Small adventitious plantlets are grown on the mother plant and are then released when ready.

It can provide useful shade to shyer fish and small fry. The dense roots are said to take nutrients out of the water, helping to prevent the growth of algae.

See also

*'' Diplazium esculentum''

References

External links

PROTAbase on ''Ceratopteris thalictroides''Flora of North America: ''Ceratopteris thalictroides''
a


Tropica

{{Taxonbar, from=Q2946391

Pteridaceae
Flora of Asia
Flora of Australia
Aquatic plants
Flora of New South Wales
Flora of Queensland
Flora of Western Australia
Flora of the Northern Territory
Taxa named by Adolphe-Théodore Brongniart
Taxa named by Carl Linnaeus