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Dryopteris dilatata - (Hoffm.)A.Gray.
                 
Common Name Shield Fern
Family Dryopteridaceae
USDA hardiness 4-8
Known Hazards Although we have found no reports for this species, a number of ferns contain carcinogens so some caution is advisable[200]. The fresh plant contains 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]. However, there have been reports for other species of ferns suggesting that even cooked fronds can have a long term harmful effect. Some caution is therefore advised.
Habitats Woods, hedgebanks, wet heaths, shady rock ledges and crevices[17].
Range Europe, including Britain, Iceland and N. Russia south and east to Spain and temperate Asia.
Edibility Rating  
Other Uses  
Weed Potential No
Medicinal Rating  
Care
Fully Hardy Moist Soil Semi-shade

Summary

Dryopteris dilatata Shield Fern


http://commons.wikimedia.org/wiki/User:Radomil
Dryopteris dilatata Shield Fern
   
Physical Characteristics
 icon of manicon of fern
Dryopteris dilatata is a FERN growing to 1.2 m (4ft) by 0.5 m (1ft 8in).
It is hardy to zone (UK) 5. The seeds ripen from Jul to September. Suitable for: light (sandy), medium (loamy) and heavy (clay) soils. Suitable pH: acid and neutral soils. It can grow in semi-shade (light woodland). It prefers moist soil and can tolerate drought.

Synonyms
D. aristata. D. austriaca. Lastrea dilatata.

Habitats
Woodland Garden Dappled Shade; Shady Edge; Ground Cover; Hedgerow; North Wall. In. East Wall. In.
Edible Uses
Edible Parts: Leaves;  Root.
Edible Uses:

Young fronds - they must be cooked[172. Some caution is advised, see the notes above on toxicity. Root - cooked[118, 161, 177]. Harvested in the spring and baked[213].
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.

Antidandruff;  Vermifuge.

The root contains ‘filicin’, a substance that paralyses tapeworms and other internal parasites and has been used as a worm expellent[4, 172, 238]. It is one of the most effective treatments known for tapeworms - its use should be immediately followed by a non-oily purgative such as magnesium sulphate in order to expel the worms from the body[238]. An oily purge, such as caster oil, increases the absorption of the fern root and can be dangerous[238]. The root is harvested in the autumn and can be dried for later use, it should not be stored for longer than 12 months[238]. This remedy should be used with caution and only under the supervision of a qualified practitioner[238]. The root is toxic and the dosage is critical[238]. See also the notes above on toxicity. The root is also used in the treatment of dandruff[4, 172].
Other Uses
Hair;  Packing.

An infusion of the fronds is used as a hair rinse and to treat dandruff[172, 213]. The leaves can be used as a packing material for fruit etc[172]. Plants can be grown as a ground cover when spaced about 60cm apart each way[208].
Cultivation details
An easily grown plant[233], it prefers an acid to neutral soil, succeeding in ordinary fertile soil in a shady position[175, 200]. Prefers a moist soil[188], but is drought tolerant when well established[200]. Plants are evergreen in mild winters[188]. Members of this genus are rarely if ever troubled by browsing deer[233].
Propagation
Spores - can be sown at any time of the year in a greenhouse. Surface sow on a sterilised compost and keep moist, possibly by placing the pot in a plastic bag. Germinates in 1 - 3 months at 20°c. Pot up small clumps of the plants when they are large enough to handle and grow on in a shady part of the greenhouse until large enough to plant out. Division in spring. Larger clumps can be replanted direct into their permanent positions, though it is best to pot up smaller clumps and grow them on in a cold frame until they are rooting well. Plant them out in the spring.

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Other Names
Found In
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
Dryopteris barbigera 04
Dryopteris blandfordii 04
Dryopteris carthusianaNarrow Buckler Fern, Spinulose woodfern24
Dryopteris crassirhizomaCrown Wood-Fern14
Dryopteris cristataCrested Wood Fern04
Dryopteris expansaSpiny Wood Fern, Spreading woodfern23
Dryopteris filix-masMale Fern24
Dryopteris fragransFragrant Woodfern10
Dryopteris marginalisMarginal Woodfern, Leather Wood Fern04
Dryopteris odontoloma 04
Dryopteris oreadesMountain Male Fern04
Dryopteris schimperiana 04
Dryopteris sieboldii 10
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Author
(Hoffm.)A.Gray.
Botanical References
17200
Links / References
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Subject : Dryopteris dilatata  

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