Practical
Plants

Asplenium trichomanes

Maidenhair Spleenwort

an evergreen member of the Asplenium genus in the family Polypodiaceae.

No photo available

Taxonomy and growth

Foliage
evergreen
Height
0.4 m

Uses

Toxicity

Toxicity warning. The historical record reports a hazard for this plant. Do not use it to decide which parts are safe to eat or use medicinally.

This section contains historical Plants For A Future notes marked noncommercial.

Although we have found no reports of toxicity for this species, a number of ferns contain carcinogens so some caution is advisable[5]. 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[4].

Edible uses

This section contains historical Plants For A Future notes marked noncommercial.

The dried fronds have been used as a tea substitute[11].

Product or use
Tea

Medicinal uses

Historical medicinal uses. These records describe reported uses. They do not establish safety or effectiveness. Ask a qualified health professional before using any plant medicinally.

This section contains historical Plants For A Future notes marked noncommercial.

A tea made from the fronds is sweet, demulcent, expectorant and laxative[11][7]. It has been used in the treatment of chest complaints[11] and to promote menstruation[8].

Product or use
Demulcent
Product or use
Emmenagogue
Product or use
Expectorant
Product or use
Laxative

Environment

Range
Most temperate regions of the world, including Britain, mountains in the Tropics.
Habitat
Walls and crevices of mainly basic rocks[3].
Light
partial sun
Shade tolerance
permanent shade
Water
moderate
Hardiness
Zone 6+
Soil textures
sandy, loamy
Soil pH
acid, neutral, alkaline
Drainage
well drained
Tolerates Nutritionally Poor Soil
No
Drought
intolerant

Propagation

This section contains historical Plants For A Future notes marked noncommercial.

Spores - best sown as soon as they are ripe on the surface of a humus-rich sterilized soil. Keep the compost moist, preferably by putting a plastic bag over the pot. The spores usually germinate in the spring[1]. Spring sown spores germinate in 1 - 3 months at 15°c[2]. Pot on small clumps of plantlets as soon as they are large enough to handle and grow them on in light shade in a greenhouse. Keep the plants humid until they are well established. Once the plants are 15cm or more tall, plant them out into their permanent positions in the spring.

Cultivation

This section contains historical Plants For A Future notes marked noncommercial.

Requires a well-drained position and lots of old mortar rubble in the soil[1]. Requires a humid atmosphere and some shade[9][10]. A good plant for growing on a shady part of an old dry-stone or brick wall[K]. Plants are hardy to about -30°c[5]. Members of this genus are rarely if ever troubled by browsing deer[6].

References

  1. F. Chittendon. RHS Dictionary of Plants plus Supplement. 1956 Oxford University Press 1951-00-00

    ↩1↩2

  2. Rice. G. (Editor) Growing from Seed. Volume 2. Thompson and Morgan. 1988-00-00

    ↩

  3. Clapham, Tootin and Warburg. Flora of the British Isles. Cambridge University Press 1962-00-00

    ↩

  4. Schofield. J. J. Discovering Wild Plants - Alaska, W. Canada and the Northwest.

    ↩

  5. Huxley. A. The New RHS Dictionary of Gardening. 1992. MacMillan Press 1992-00-00 ISBN 0-333-47494-5

    ↩1↩2

  6. Thomas. G. S. Perennial Garden Plants J. M. Dent & Sons, London. 1990-00-00 ISBN 0 460 86048 8

    ↩

  7. 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. 1986-00-00

    ↩

  8. Moerman. D. Native American Ethnobotany Timber Press. Oregon. 1998-00-00 ISBN 0-88192-453-9

    ↩

  9. Knight. F. P. Plants for Shade. Royal Horticultural Society. 1980-00-00 ISBN 0-900629-78-9

    ↩

  10. Brown. Shade Plants for Garden and Woodland.

    ↩

  11. Grieve. A Modern Herbal. Penguin 1984-00-00 ISBN 0-14-046-440-9

    ↩1↩2↩3

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