We have no other reports for this species, but the following uses apply to many members of this genus and quite probably also to this species[K].
The root contains 'filicin', a substance that paralyses tapeworms and other internal parasites and has been used as a worm expellent. 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. An oily purge, such as caster oil, increases the absorption of the fern root and can be dangerous. The root is harvested in the autumn and can be dried for later use, it should not be stored for longer than 12 months. This remedy should be used with caution and only under the supervision of a qualified practitioner. The root is toxic and the dosage is critical. See also the notes above on toxicity.The root is also used in the treatment of dandruff.
Practical Plants is currently lacking information on propagation instructions of Dryopteris expansa. Help us fill in the blanks! Edit this page to add your knowledge.
Closely related to D. dilatata and hybridising where their ranges meet to produce D. x ambroseae.Members of this genus are rarely if ever troubled by browsing deer.
Problems, pests & diseases
Associations & Interactions
There are no interactions listed for Dryopteris expansa. Do you know of an interaction that should be listed here? to add it.
Polycultures & Guilds
There are no polycultures listed which include Dryopteris expansa.
This table shows all the data stored for this plant.
- Huxley. A. The New RHS Dictionary of Gardening. 1992. MacMillan Press ISBN 0-333-47494-5 (1992-00-00)
- Schofield. J. J. Discovering Wild Plants - Alaska, W. Canada and the Northwest. ()
- Turner. N. J. Food Plants of Coastal First Peoples UBC Press. Vancouver. ISBN 0-7748-0533-1 (1995-00-00)
- Moerman. D. Native American Ethnobotany Timber Press. Oregon. ISBN 0-88192-453-9 (1998-00-00)
- Grieve. A Modern Herbal. Penguin ISBN 0-14-046-440-9 (1984-00-00)
- Bown. D. Encyclopaedia of Herbs and their Uses. Dorling Kindersley, London. ISBN 0-7513-020-31 (1995-00-00)
- Thomas. G. S. Perennial Garden Plants J. M. Dent & Sons, London. ISBN 0 460 86048 8 (1990-00-00)
- Bird. R. (Editor) Focus on Plants. Volume 5. (formerly 'Growing from seed') Thompson and Morgan. (1991-00-00)
- Brickell. C. The RHS Gardener's Encyclopedia of Plants and Flowers Dorling Kindersley Publishers Ltd. ISBN 0-86318-386-7 (1990-00-00)
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