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Dryopteris odontoloma

Common name:		Family:	Dryopteridaceae
Author:	(Moore.)C.Chr.	Botanical references:
Synonyms:
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.
Range:	E. Asia - Himalayas at elevations to 3000 metres in the Kashmir valley.
Habitat:	Not known
Edibility Rating (1-5):	0	Medicinal Rating (1-5):	4

Epithets:	From a Dictionary of Botanical Epithets
	odontoloma = toothed husk ?;
Systematics:	From a USDA Plants Database
	Order: Polypodiales. Wood Fern family

Physical Characteristics

Fern. . We rate it 0/5 for edibility and 4/5 for medicinal use.

The plant prefers light (sandy), medium (loamy) and heavy (clay) soils. The plant prefers acid and neutral soils. It can grow in semi-shade (light woodland). It requires moist soil and can tolerate drought.

Habitats and Possible Locations

Woodland, Dappled Shade, Shady Edge.

Edible Uses

None known

Medicinal Uses

Disclaimer

Vermifuge.

The root contains 2.3% 'filicin'[240], a substance that paralyses tapeworms and other internal parasites and has been used as a worm expellent[61, 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.

Other Uses

None known

Cultivation details

We have very little information on this species and do not know if it will be hardy in Britain, though judging by the plants native range it should succeed outdoors at least in the milder areas of the country. The following notes are based on the general needs of the genus.
Prefers an acid to neutral soil, succeeding in ordinary fertile soil in a shady position[175, 200]. Prefers a moist soil[188], but plants are drought tolerant when established[200].
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.

Suppliers

For more details of plant suppliers please see our Suppliers Page which lists many more places to look.

Web References

[HP] Links, Photos, Suppliers from Hortiplex Plant Database

See the PFAF Links Pages for other sources.

Also try Photos and info from the The Plants Database which has 14,000 images.

References

[61] Usher. G. A Dictionary of Plants Used by Man. Constable 1974 ISBN 0094579202
Forget the sexist title, this is one of the best books on the subject. Lists a very extensive range of useful plants from around the world with very brief details of the uses. Not for the casual reader.

[172] Schofield. J. J. Discovering Wild Plants - Alaska, W. Canada and the Northwest.
A nice guide to some useful plants in that area.

[175] Bird. R. (Editor) Focus on Plants. Volume 5. (formerly 'Growing from seed') Thompson and Morgan. 1991
Very readable magazine with lots of information on propagation. A good article on Corydalis spp.

[188] Brickell. C. The RHS Gardener's Encyclopedia of Plants and Flowers Dorling Kindersley Publishers Ltd. 1990 ISBN 0-86318-386-7
Excellent range of photographs, some cultivation details but very little information on plant uses.

[200] Huxley. A. The New RHS Dictionary of Gardening. 1992. MacMillan Press 1992 ISBN 0-333-47494-5
Excellent and very comprehensive, though it contains a number of silly mistakes. Readable yet also very detailed.

[233] Thomas. G. S. Perennial Garden Plants J. M. Dent & Sons, London. 1990 ISBN 0 460 86048 8
A concise guide to a wide range of perennials. Lots of cultivation guides, very little on plant uses.

[238] Bown. D. Encyclopaedia of Herbs and their Uses. Dorling Kindersley, London. 1995 ISBN 0-7513-020-31
A very well presented and informative book on herbs from around the globe. Plenty in it for both the casual reader and the serious student. Just one main quibble is the silly way of having two separate entries for each plant.

[240] Chopra. R. N., Nayar. S. L. and Chopra. I. C. Glossary of Indian Medicinal Plants (Including the Supplement). Council of Scientific and Industrial Research, New Delhi. 1986
Very terse details of medicinal uses of plants with a wide range of references and details of research into the plants chemistry. Not for the casual reader.

Readers Comments

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Plant information taken from the Plants For A Future - Species Database. Copyright (c) 1997-2003.
WEB search engine by Rich Morris - Home Page- Contact Info
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We make no claims of magical effects or supernatural powers for any item in this catalog. In spite of legendary attributes or occult and craft tradition, such items are offered as curios only and beliefs concerning their magical effectiveness are related only for historical interest.