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Cystopteris fragilis - (L.)Bernh.

Common Name Brittle Bladder Fern
Family Dryopteridaceae
USDA hardiness Coming soon
Known Hazards Although we have found no reports of toxicity for this species, a number of ferns contain carcinogens so some caution is advisable[200]. Many ferns also contain thiaminase, an enzyme that robs the body of its vitamin B complex. In small quantities this enzyme will do no harm to people eating an adequate diet that is rich in vitamin B, though large quantities can cause severe health problems. The enzyme is destroyed by heat or thorough drying, so cooking the plant will remove the thiaminase[172].
Habitats Rocky woods, shady rocks and walls, especially on basic rocks, to 1200 metres[17].
Range Cosmopolitan, found in most areas of the world, including Britain, but only on mountains in Tropics.
Edibility Rating  
Other Uses  
Weed Potential No
Medicinal Rating  
Care
Fully Hardy Moist Soil Full shade Semi-shade
Cystopteris fragilis Brittle Bladder Fern


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Cystopteris fragilis Brittle Bladder Fern
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Summary


Physical Characteristics

 icon of manicon of fern
Cystopteris fragilis is a deciduous Fern growing to 0.2 m (0ft 8in) by 0.2 m (0ft 8in).
It is hardy to zone (UK) 2. The seeds ripen from Jul to August. Suitable for: light (sandy), medium (loamy) and heavy (clay) soils and prefers well-drained soil. Suitable pH: acid, neutral and basic (alkaline) soils. It can grow in full shade (deep woodland) or semi-shade (light woodland). It prefers moist soil.

Synonyms

Habitats

Woodland Garden Dappled Shade; Shady Edge; not Deep Shade; Ground Cover; North Wall. In. East Wall. In.

Edible Uses

Edible Parts: Root.
Edible Uses:

Root. An emergency food, it is only used when all else fails[172].

Medicinal Uses



Plants For A Future can not take any responsibility for any adverse effects from the use of plants. Always seek advice from a professional before using a plant medicinally.

Anthelmintic.

A decoction of the roots has been used as an anthelmintic enema[240]. A cold compound infusion of the plant has been used both internally and externally as a treatment for injury[257].

Other Uses

Plants can be grown as a ground cover when planted out about 15cm apart each way[208].

Cultivation details

Prefers a shady position in a moist but well-drained soil, succeeding in most soil types[200]. Plants can tolerate up to 4 hours direct sun per day[200]. Prefers a pH between 6.5 and 7, but tolerates a range from 5.5 to 7.5[200]. Plants do especially well when grown in a shaded position on old mortared walls[219]. Members of this genus are rarely if ever troubled by browsing deer[233]. Plants die back early in dry seasons[200]. A very ornamental plant[1].

Propagation

Spores - best sown as soon as ripe on the surface of a humus-rich sterilized soil. Keep the compost moist, preferably by putting a plastic bag over the pot. Germinates in 1 - 3 months at 20°c[164].Pot on small clumps of plantlets as soon as they are large enough to handle and keep humid until they are well established. Do not plant outside until the ferns are at least 2 years old. Division in spring.

Other Names

If available other names are mentioned here

Found In

Countries where the plant has been found are listed here if the information is available

Weed Potential

Right plant wrong place. We are currently updating this section. Please note that a plant may be invasive in one area but may not in your area so it’s worth checking.

Conservation Status

IUCN Red List of Threatened Plants Status :

Related Plants
Latin NameCommon NameEdibility RatingMedicinal Rating
Cystopteris bulbiferaBerry Bladder Fern, Bulblet bladderfern10
Cystopteris montanaMountain Bladder Fern10

 

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Author

(L.)Bernh.

Botanical References

17200

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Subject : Cystopteris fragilis  
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